This is a story of casual, unprotected sex, and is a work of fiction. In real life, use a condom, damnit! Unwanted babies, HIV and all sorts of lesser sexual diseases await the idiot who “dips his wick” or “rides the rod” without protection.

—

Nerdy Girl 2 – The Wrath of Cum (mf, ff, fff, con, nc, voy, 1st, impreg, inter, inc)

by Krosis of the Collective

—

Theresa squished the used condom in her jacket pocket with her thumb and forefinger as she walked up to her house. Her mind wandered back to her date, now over.

Jay, another senior student, had asked her out during lunch earlier that week. Tonight, Friday, he had taken her to dinner at Burger King (blech), and then she drove them up to “Lover’s Lane,” where she had proceeded to give him a blowjob. She wasn’t “easy,” but she had an ulterior motive for the oral pleasuring. She didn’t want to mess up her car, she told him, and when he got close to cumming she slipped a condom onto his not-very-impressive cock and jacked him off into it. While he was putting his dick back into his pants she tied off the condom and slipped it into her jacket pocket.

She had planned something like this since she had gotten back home after the summer break. Oh, that summer! She had spent it with her older sister in the big city, and during that time she had discovered that she had a kink: she loved man cum! The feel of it, as well as the danger it represented. Just a small bit at the right/wrong time could make her pregnant, and when her sister’s boyfriend had blackmailed her into having sex with him he had put a LOT of his cum inside her for weeks. It was a miracle she hadn’t gotten pregnant.

Theresa opened the door with her key, called out to her parents so they knew she was home before curfew, and then headed to her room, palming the used condom as she hung her coat on the entryway hooks.

Once in the safety of her room she closed the door, took off her clothes and reclined on the bed. There’s nothing more comforting than the feel of your own bed beneath you, she mused, sighing. She opened her side drawer and extracted her vibrator, and then dropped it on her flat stomach as she untied the condom.

She gave the contents a sniff. Even though she purchased the most basic condoms she could find, it still added a chemical smell to the cum. How far would she go to get some that smelled like it should? She shuddered at the thought.

Her pussy was very wet now, and her long pink nipples were erect. She put her index finger into the condom, extracting some semen, and rubbed the rich cream on her nipples. God, she missed cum! It had been weeks since summer break, long enough to have her blessed period and for that to have just finished yesterday, which had reawakened her sex drive. She should be safe enough now…

She licked her lips and put some more cum on her fingers. Those fingers wormed their way down, down, toward her throbbing womanhood, leaving a slick white trail as they went. She skimmed her fingers along the ends of her trimmed pubes, and then lightly rubbed her outer pussy lips. It felt good!

Leaving the little bit of man cum on her outer labia, she took the vibrator and turned it on. She also had a dildo but when she had returned after summer she found it just didn’t “do it” for her anymore — not after getting fucked for real — and bought this bad boy with her remaining “mad money.” However, she still couldn’t cum very hard without the man cum doing its magic on her.

The vibrator hummed as she moved it down to her nether regions. She touched it to her clit and jumped…she was already too stimulated for that! She moved it lower, rubbing the head along her outer lips. She could see it becoming slick from her juices, and the semen she had left there!

She looked at the dangerous juice on the tip of the vibrator…should she do this? If she started again, would she be able to stop in a week or so? The vibrations along her outer labia were being absorbed into her skin, stimulating her clitoris lightly.

I will be careful, she promised herself, and dipped the head of the vibrator into her hot, moist pussy. The feeling was overwhelming, the vibrations stimulating her, inside and out. The knowledge that she had just pushed some of Jay’s sperm inside of her thrilled her…A LOT. She started cumming only a few seconds later, with only a third of the 8 inch vibe inside her.

In the bedroom next door, Theresa’s younger sister Penny looked up from her computer. What was that noise?

After she had come down from her cum Theresa extracted the vibrator from within her and switched it off. Holy shit that was overwhelming! Cumming from her old dildo when she was playing with sperm was one thing, but this was intense! The vibe had been a good purchase, she affirmed herself.

She held the condom with one hand and pushed the vibrator down into the rubber so that the head of the vibe dipped into the semen. She took it back out, switched it back on, and returned it to her pussy. The combination of the dripping semen and her own orgasmic juices allowed it to slide back in easily. Theresa felt so full.

I’m doing it again, she thought, I’m pushing the stuff that makes babies inside of myself! Her pussy felt afire, and she pushed and pulled on the vibrating phallus, bringing herself closer and closer to release.

She thought about the sperm inside her now, doing their thing, moving deeper inside her and tirelessly searching for her egg. Oh God! Her breathing was ragged.

Penny moved to the wall, cupping her ear to it. What was Theresa doing to make that buzzing noise, and was she gasping?

“Cum in me,” Theresa whispered. “Put your cum in me…” She was remembering the summer break, when her sister’s boyfriend had had unprotected sex with her, filling her with his seed. Her hand moved faster, and the vibrator moved in and out, slick with two people’s cum.

Theresa had read up on the female fertile cycle long ago. She knew what happened when a woman orgasmed while semen was already inside her vagina. Her cervix would open up and draw any of the semen near it further inside her, increasing the chance of pregnancy. It was so fucking hot!

“Uh…uhh…” she gasped. Close, so close…

Penny realized that she was hearing her sister pleasuring herself. Holy shit!

“Uaahhh!” Theresa came, lifting her pelvis to get maximum penetration. Her cervix did indeed open up, pulling some of the small amount of sperm she had pushed inside herself further inside. The sperm continued on their preprogrammed journey into her depths.

After a minute Theresa recovered enough to re-tie the condom and secure it in her side drawer. She also wiped off her vibrator and plugged it into its charging cable, which she had wound through the back of the drawer to hide it. One nice side effect of the charging cable was that it kept the vibrator warm, and when she put the vibe on top of the used condom it kept the semen warm, and the sperm alive longer. Even with that she figured she maybe had a day or so of “life” from the condom. She wasn’t going to waste it.

—

Theresa woke in the night. The “itch” had returned, and she knew what she had to do to satisfy it. More of Jay’s cum was sucked deep inside of her reproductive system from the vibrator before she was able to return to happy, sated slumber.

In the next room Penny had also been awoken when the buzzing and gasping sounds resumed. The younger girl had played with her own clit while listening, though she felt wrong pleasuring herself to her sister’s moans, and stopped right after Theresa was done. She eventually fell back asleep, unfulfilled.

—

On Saturday Theresa helped her Mom in the garden. While she was out there Penny decided to have a look at what Terri had in her room that made the buzzing noise. She tiptoed into her sister’s room, looked under the pillow, under the mattress, and had just started to open Terri’s bedside table drawer when she heard footsteps approaching. She had just managed to close the drawer when Terri burst into the room.

“What are you doing?!” Terri cried out. “Get out of my room!”

Penny had spied the vibrator just before closing the drawer. She didn’t let on she had seen it, though. “I was just…looking for a pen…?”

Terri shook her head, disbelievingly. “Yeah, right…OUT!”

As the 15-year-old tromped past and out the door, Theresa thought about how she and her sister were so dissimilar. Theresa, bespectacled and brown haired, liked reading and quiet nights at home, while Penny, blonde and leggy, couldn’t wait until she could start dating a few months from now at age 16, and would probably never be home on any given night once she obtained that freedom. The two girls just didn’t get along, and the fact that youngest child Penny got along better with her older sister Bethany than her didn’t help either.

She thought back to the summer visiting Beth, which reminded her of all the sex she had had with Beth’s boyfriend Jeff. Instantly her pussy got wet. Damnit! Her Mom had sent her inside to get warmer clothes because the wind had picked up…would she miss her for a few minutes? She closed her door and whipped her pants off, grabbing the vibrator and condom. She smeared more of Jay’s cum on the electric phallus and pushed it into her slick vag as she squatted down. Unhh! So good! She furiously manipulated the fake cock in and out as she crouched there until she came hard on it. When she removed the vibrator it had some of her cum on it but she couldn’t spot any semen. She had a nice orgasmic “aftershock” at the thought of the sperm swimming inside of her.

As she cleaned up the vibrator she thought about how close her sister had come to finding it. She didn’t think that Penny actually knew about it; she was probably just snooping, she thought. She put a few items from the top of her side table into the drawer to block direct line of sight to the vibe and the condom, which looked to only have one “session’s” worth of semen left. She sighed. She would have to regulate its use and get some more on Monday.

—

Theresa kept an eye on her sister for the rest of the weekend so Penny didn’t have a chance to check out the vibrator again. She had only gotten a glimpse but it looked big!

—

The family went to church on Sunday morning, as per usual. Theresa had trouble keeping her mind on anything but the last of the cum waiting for her back at home. They went to brunch at Denny’s, and then visited family. By the time they got home it was late afternoon. They watched some TV until dinner, and then retired to their rooms.

Theresa made sure to make the last of Jay’s cum last, pushing it drop by drop into her wet pussy with the vibrator. She came three times that evening, and this time Penny couldn’t keep from playing with her own pussy until she came on the other side of their adjoining wall, thinking about her middle sister Terri pushing that big fake penis inside of her.

—

On Monday Terri wore a low-cut blouse and short skirt that had all the guys at school looking. While she had been a skinny bookworm for most of high school, she had fleshed out during the summer, and had also been taken clothes shopping for a better wardrobe before school started again. She still had the glasses — she really couldn’t see well without them — and it gave her a smart and sexy look.

One eye she attracted belonged to Peardon Jones, one of the football players. A dark skinned teenager with a great athletic body, he was used to getting the girls he wanted.

“Hey Terri,” he drawled to her at lunch as he sat down next to her. “Looking good.”

Terri was taken aback, not having spoken to him before. He had actually asked around until he had obtained her name from others, then moved in for “the kill.”

They made small talk until they finished their lunch, glancing at each other appraisingly, and then he asked if she wanted to go somewhere with him. She was still surprised but intrigued, and they left the lunch room together.

He took her to the equipment room off of the gymnasium, both of which were empty at this time of day. As soon as the door closed she immediately dropped down to her knees, unzipped him, and then started to suck his cock. He hadn’t expected this…he thought maybe they would make out some, possibly he’d get some boobsqueeze…but this was great! He grabbed her head to get more of his big cock into her mouth.

Theresa wanted to get his cum into a condom but realized that the no-mess excuse she used in her car with Jay didn’t make sense in this dusty place. Peardon had a nice-sized cock, though, a little bigger than her sister’s boyfriend Jeff’s. She had an idea.

She stopped sucking Peardon, stood up, pulled off her panties, and then grabbed a condom from her skirt pocket. She looked at the fit athlete’s cock, big and slick in front of her, and decided to palm the condom for now. She bent over some gym equipment and flipped her skirt up, showing off her slick, puffy pussy lips.

“Aw yeah,” Peardon groaned as he saw her pussy and nicely rounded ass cheeks. He went up behind the hot little nerd girl and fisted his cock, lining it up with her wet pussy. He only wondered for a moment about whether she was safe, then the thought flew out of his head as he pushed forward. His dark cockhead pierced her labia. They both gasped in pleasure as he slowly penetrated her.

Theresa was in heaven. She hadn’t gotten fucked in weeks, and this was the biggest cock she had experienced, other than when Jeff had taken Viagra(tm) and had fucked her several times in a hotel room near the end of summer. She still didn’t know that she had actually been fucked by several of Jeff’s friends that day because of the blindfold he’d put on her, and the award for the biggest cock she had ever had inside her still belonged to Jeff’s friend Colin.

Peardon pulled back with just the head of his cock in her, and then pushed in again. Fuck she was tight! The bitches he normally fucked were a lot looser than this, but they also put out for a lot of the football players, not just him. He eventually got all the way inside her. She was gasping, close to cumming by the feel of her. He reached around and started to play with her clit. That did it, and she started to gasp and cum on his cock. It felt incredible, and he almost came right then and there, which would not have done well for his reputation as an expert cocksman!

He concentrated on slowing down his breathing, just holding his cock inside this hot nerd girl. Terri reached back and pushed something into his hand…a condom packet. Aw shit, the girl wasn’t safe after all, he realized. He didn’t want a baby, so he pulled out, slipped the prophylactic on, and then pushed it back inside her. She was so wet he didn’t need any lube.

With the condom it didn’t feel as good, so he was able to back off from his own orgasm. After a few more minutes he lifted one of her knees up onto the gym equipment so he could angle his cock a bit differently. That felt great for both of them, and within a few more minutes she was cumming again. The extra squeezing on his cock set him off this time, and he filled the condom with his cum.

As they cleaned up he was readying his usual “love ’em and leave ’em” speech, but surprisingly, she just asked if he wouldn’t tell anyone they had done this, and could they just be casual? He just nodded, so dumbfounded that he didn’t even notice she had pocketed the used condom.

—

Terri had trouble concentrating on her classes in the afternoon, occasionally squishing the used condom in her pocket between her fingers. She had more! She was definitely going to use it tonight.

—

Jay caught up to Theresa after school as she got to the parking lot. He had heard she had gone off with Peardon Jones at lunch, and wanted to know what that meant for him.

Theresa answered by ushering him into her car and driving him to “Lover’s Lane” again, rubbing his cock through his jeans as they went. When they got there she pulled his cock out, swung her legs over his hips, moved her panties aside and mounted him, throwing caution to the wind, readying a condom for when he would cum.

Unfortunately, she had actually just taken Jay’s cherry, and he only lasted a minute or so, surprising Terri.

“Ohh! Auhh!” Jay cried out, holding her hips down as he blasted her inner workings with his hot seed.

“What…what are…? OH FUCK! Unh! UHH!” When Terri realized that he was shooting babymaking sperm into her unprotected pussy, her kink kicked in and she started to cum as well, her hot insides sucking as much of the seed as deep inside her as it could.

As she collapsed forward, Jay’s head against her bosom, she was disappointed that she wouldn’t have more cum to play with at home but she also got what she really, really wanted, and that was a cunt full of fresh, hot cum. She thanked her lucky stars that she was still in her safe part of the month.

She kissed Jay tenderly and then dropped him off at his home, leaving him standing there with a silly grin on his face and a promise that there would be more fun soon.

She dropped by a sex store on her way home to get more condoms with her allowance, and then had an idea when she spotted some more things she could use.

When she got home she unpacked her filled condom, and a squeeze bottle of lubricant. She emptied all the lube into the toilet and flushed it, cleaned the tube out with water, and then dripped the cum from the condom into the squeeze bottle, screwing the cap back on afterwards. On the way home she had realized that someone (like her sister) might find her vibrator, and while her parents knowing she had a vibrator wasn’t the end of the world, she would not be able to sufficiently explain the used condom. A squeeze bottle of lube would just seem to go naturally with the vibrator. Though she never actually needed lubrication, no one else would know that.

—

That night she squeezed out some of the semen from the lube bottle onto the vibrator. As she pushed Peardon’s cum inside her she came hard, and so did her sister in the next room, her ear pressed to the wall.

—

Tuesday morning arrived, and Terri flew out the door to go to school. Penny had left earlier, but had actually circled the block and came back after everyone else had left. She was going to miss her first period (ha) but she had to get a closer look at her sister’s vibrator. Her parents were very conservative, and would never have allowed her to have something like that, so Terri must have bought it herself and kept it secret.

She stole into her sister’s room. Even though there was no one else in the house she was still as quiet as she could be. Her sister would kill her if she found her in her room, and especially if she caught her with that thing! She went to the side table and opened it. The drawer was more crowded than before, but after pushing some things aside she saw it. It was as big as she had remembered, and felt warm as she touched it. Her hand bumped something else as she unhooked the vibe from its charging cable, and she noticed a squeeze bottle that identified itself as personal lubricant. She grabbed that as well.

Penny suddenly felt self-conscious holding the vibe in her sister’s room so she closed the drawer and went to her room, closing the door and sitting on her bed.

She held the vibrator reverently. How did you turn it on? She finally found that she could just twist the base and it came alive in her hands. Buzzzz.

Her pussy lips were engorged…she could feel them. She dropped the vibe and lube to the side, lay down, and then pulled her skirt up and her panties off. She brought the vibrator down to her pussy. She gasped as the vibrations spread out along her labia, making her clit throb. She played with the vibe, allowing the sides of the fake cock to run along her pussy lips. When she tried to put the tip of the vibrator inside her, though, she had problems. Unlike her sister, she did not produce much lubrication herself. She had tried this with a hair brush one time but without lubrication it had actually kind of hurt going in so she hadn’t tried with anything else.

She removed her skirt entirely so that she would have a good vantage for what she was going to try to do. She then opened the cap of the lube and squeezed some onto her fingers. She rubbed it between her thumb and forefinger, feeling the viscosity, and then moved her fingers down to her pussy, rubbing the lube up and down her vaginal opening. Ah, that felt good! She dipped her fingers inside a little, feeling her pussy opening up with the help of the lube.

Unknowingly, pretty Penny had just pushed some of Peardon’s semen inside of her virginal pussy. The sperm that inundated the semen moved further inside the warm, wet channel, doing their best to impregnate the pretty young blonde.

Penny, breathing heavier, grabbed the vibrator. She pushed the tip between her pussy lips, feeling it move inside a bit. She was still really tight. It felt good but she wanted more. She tried pushing harder but still had trouble. Finally she grabbed the bottle of lube and, pulling the vibrator out so it was just touching her vaginal lips, squeezed a good amount right where the tip of the vibe rested against her “holiest of holies.”

She then pulled the vibrator into her a bit harder than she meant to, and with the additional “lubricant” it rushed into her. “Ow!” she cried out as it hit what was left of her hymen, which had originally ripped a little when she had tried this with a hair brush a few weeks previous. The additional sperm in the semen she had squirted onto the vibe took advantage of the newly widened opening.

She paused, collecting herself. That had hurt! She needed to be more careful. When she was ready she tried again, making sure not to pull the vibrator too far inside of her. She was only able to get a couple of inches in without hitting the shredded remains of her hymen, but soon she built up a good rhythm. It started to feel really good down there. Within minutes she was gasping, and she moved the vibe inside her faster and faster, until…

“Aughh! Uahh!” she wailed as her pussy clamped down hard on the vibrating dildo. Inside, her cervix opened up and plunged down into her vaginal cavity, sucking up the small puddle of sperm she had deposited there deeper into her fertile young body.

After she had recovered from her orgasm Penny cleaned up the blood and “lube,” and returned the cleaned vibrator to her sister’s bedside drawer, making sure to put it back exactly as she had found it. Inside her fit, lithe young body, the sperm from Peardon Jones she had unknowingly inserted into her reproductive system quested further inside her…

—

That night Penny again listened at the wall as Terri pleasured herself with her vibrator. Penny played with herself but couldn’t get off. She needed that plastic cock!

—

Terri noted as she put the bottle of “lube” away that she must have used too much of Peardon’s sperm the previous night. There looked to be maybe a couple of “uses” left, so she would have to make sure to get some more soon.

—

Penny had gotten in trouble with her teacher the previous morning and didn’t want that again so she went to school the next day instead of hanging back to play with the vibrator again. After school her best friend May visited and they were in Penny’s room when the phone rang. Penny eavesdropped at the door, and heard her parents mention that Terri was staying late at the library.

Penny put her finger to her mouth to indicate that May should be quiet. The slim Korean girl looked intrigued at her friend’s secretive behavior, and Penny ushered her into Terri’s room. Penny opened the drawer and showed her friend the vibrator. May’s eyes opened wide as she realized what she was seeing.

May was also from a strict Christian family, so was quite sheltered from such things. She wanted to know everything about the plastic sex toy. Penny had only wanted to show her friend the toy, nothing more, but the room had become sexually charged when the vibe came out. Both girls were now very turned on, May because of the naughtiness of what she was seeing, and Penny because she was remembering how that vibrator made her cum the previous morning. Penny could see May’s nipples poking through her bra and t-shirt.

Penny explained, “I borrowed it yesterday. Oh, May, it feels so good when it touches you, all vibrating. It’s warm…feel it.”

May touched the plastic phallus and Penny turned it on. May took her hand away quickly as the vibe buzzed to life, but she was only briefly startled. She stared at it longingly. As a blossoming young woman she knew she was missing something…something like that!

Penny had always thought May was beautiful with her almond eyes and smooth skin, but she had never thought of her friend like this before. “Lie down,” she directed May, pointing to her sister’s bed. “Take off your pants. I’ll show you how it works.”

May did so eagerly, looking at Penny in a way she had never done before. She was a bit shy, but her panties came off with her pants and her brown puffy pussy lips were easily accessible.

Penny made sure May could see as she brought the vibe to May’s pussy lips. She rolled it along May’s labia majora, making the Asian beauty gasp softly. “When you’re ready the head goes into you,” Penny said softly, dipping the head a little into her friend’s vaginal hole. She realized that May needed some lubrication, so extracted the bottle from the drawer and dripped some of the “lube” onto May’s pussy. The sperm-filled semen, warm from the vibrator charging, glistened as it soaked in between the girl’s vaginal lips.

Both girls were breathing hard as Penny pushed the head of the vibe into May’s vaginal folds, gathering Peardon’s warm semen around it and pushing it inside the unknowing Korean girl.

“Ohh…” May moaned, looking at Penny lovingly. She was getting close already…

Penny moved her eyes from May’s beautiful brown pussy back to her pretty face, making sure she was careful not to hurt her friend. She had actually managed to get the vibrator in halfway without resistance. Did May not have a maidenhead? She kept pulling the vibrator out and then pushing it back in, getting more and more of it inside May each time.

When Penny got the vibrator all the way inside May her friend started to cum, making cute high pitched “Ihh! Ihh!” noises. Her back arched and her pussy clamped down on the plastic cock, sucking on it, taking the cum that had been pushed inside her and pulling it deeper inside her fertile young body. She didn’t know it, but within the next few hours or days she might start to become a mother to a half-black/half-asian baby.

Penny moved her face up to her friend’s to make sure she was alright. The two girls’ faces were only a few inches apart. In the post-orgasm glow May pulled her friend’s face to hers, kissing her. Penny was surprised but didn’t pull away…she was so turned on!

After a few minutes they heard Penny’s Mom calling them to dinner. Penny hadn’t gotten any relief and had no time to do it. They cleaned up the vibrator and put it back the way they had found it.

During dinner May touched her foot to Penny’s under the table, rubbing them together, and they smiled to each other, friends sharing a sexy secret. Theresa arrived halfway through dinner, officially putting an end to Penny’s good feelings. Penny was so jealous of her older sister. Why should Theresa have that great sex toy and she had nothing for herself?

After dinner Penny hugged May goodbye as her friend went home. Terri went to her room and Penny stayed in the living room to watch some TV, but the younger girl was distracted by her sexual frustration and went to her room a while later.

—

Penny was woken up by the sound of her sister pleasuring herself, AGAIN. Penny had tried to masturbate before sleep but hadn’t been able to. She was now spoiled by her sister’s vibrator! She was SO FRUSTRATED.

Finally she made a decision, borne of sexual frustration and jealousy. She got up, quietly slipped from her room, and went to her sister’s door. She silently opened it and went inside, softly closing the door behind her. Terri was on her bed, her back to the door so she didn’t notice her sister’s trespass until the younger girl was next to her, a finger pressed to her lips. Terri was pleasuring herself with the vibrator and didn’t notice for a few seconds, then gasped at the sudden unexpected presence. Terri’s eyes went huge and she froze in place. She kept quiet though, seeing her sister’s silent warning.

She had been caught fucking herself with the vibrator by her little sister! She waited to see what Penny would do.

Penny licked her lips and looked at the vibrator sticking out of her sister’s coochie. “I’ll tell Mom and Dad…” She waited until she saw the fear in her sister’s eyes, then continued whispering, “…unless you let me use that vibrator whenever I want.”

Terri couldn’t believe it; her sister was trying to blackmail her in order to use her vibrator?! She pulled the fake cock out of her pussy, groaning at the vacancy. She looked at it for a moment, and then held it out to Penny.

Penny, however, didn’t take it. Seeing her sister naked and glistening in the dim light, using the vibrator, had turned Penny on something fierce. She was even more turned on than when she had used the vibe on May earlier that day. May had really cum hard…

Penny had an idea…she climbed up on the other side of her sister’s bed, pulling up her nightgown a bit and pulling her panties down, revealing her blond, downy vaginal area as she sat there, her legs spread. She looked at her sister, challengingly. “I want *you* to use it on me.”

Terri was already horny as hell. She had been very close to cumming when her sister had broken the spell. She had never seen her sister’s pussy before, so similar and yet so different from her own. So horny…want to cum…danger…

She thought about the semen she had already pushed up inside herself a few minutes ago. The semen…oh God…she looked at her sister’s fuckhole…could she…?

Yes, she could! She grabbed the bottle of cum “lubricant.” This fucking little bitch sister of hers…how DARE she blackmail her?! Terri was remembering how she had been blackmailed by her older sister’s boyfriend into having unprotected sex with him that summer, and she was pissed right off! Her blackmailing little sister would get what she fucking deserved!

“Fine,” she calmly whispered, pulling Penny’s legs closer, forcing the younger girl to slip down onto her back.

Penny smiled, the epitome of a younger sister winning an argument.

Fucking bitch, Terri thought as she brought the tip of the bottle of semen down to the head of the vibrator, stifling a little smile.

She squeezed, covering the head of the vibe with semi-warm semen. She had gotten two more loads from Jay that very evening, and had mixed it with the remains of Peardon’s in the bottle. Penny was breathing hard as Terri brought the vibrator down to her sister’s hot hole. “You sure you want this, Penny?” she asked. She was feeling quite perverse.

The younger girl, not taking her eyes off the vibe, whispered, “Yes. Do it.”

Terri wasted no time, pushing the vibrating phallus deep into her younger sister’s throbbing pussy with no resistance due to the excessive amount of “lube” she had put on it. Penny gasped as the plastic invader went deep, its vibrations flowing outward. Terri pulled back, and then pushed hard again.

Penny’s pussy felt on fire! Using the vibrator on herself was one thing, but having someone else do it was way better! No wonder May had cum so quickly earlier, she thought. It was kind of like how you couldn’t massage your own shoulders very well, or tickle yourself.

Soon Penny was cumming, writhing on her sister’s bed. She was starting to get loud, so Terri leaned forward and clamped her other hand over her sister’s mouth to quieten her, which accidentally brought their chests together. After 30 seconds Penny calmed down. Terri was aware of her naked breasts pressing against her sister’s smaller ones through her nightie. She backed off, pulling the vibrator out of the younger girl’s vagina.

“Mmm…” Penny sighed. She had a new favorite thing to do, and she had something she could hold over her sister, which made it even better. She got up, pecked her surprised older sister on the cheek, and returned to her bedroom.

Terri laid back, thinking of the two boys’ semen swimming up inside Penny’s young, athletic cheerleader body. She got extremely turned on, so wiped the vibrator off and pushed it inside herself. She quickly worked herself to a strong cum.

As she recovered from her pleasure, she came to a realization that could be quite dangerous for her younger sister: as Terri got closer to her fertile time it would be extremely stupid to put semen inside herself, but those were the times when she was the most horny. However, she had just found that she could make herself cum without pushing sperm inside herself, instead thinking of pushing that dangerous substance inside her naive little sister! She experienced a pang of guilt, but told herself it was her stupid blackmailing sister’s own fault.

This was good timing, she thought, as she was getting close to her fertile time of the month. She had had unprotected sex with two different boys in the last week, and one had cum inside her. She couldn’t trust herself as she got closer to that time of the month.

—

The next night, Penny again came to Terri’s bedroom after waiting long enough for their parents to fall asleep. Penny again pulled up her nightie and pulled down her panties, lying back, looking at her older sister with undisguised lust and satisfaction.

As Terri prepared the vibrator with the “lubricant” she questioned her little sister. “Have you ever had real sex, Penny?”

“No,” replied Penny defiantly, keeping her eyes on the glistening plastic cock. “Have you?”

“I’m asking the questions,” said Terri, bringing the dripping vibrator down toward her sister’s pussy. “Why didn’t this hurt you when it went all the way in? Where’s your hymen?”

Penny closed her eyes as her sister slowly pushed the cum-covered head of the vibrator into her. “Mmm…lost it quite recently, with that.” She moved her hand down to the vibrator, touching Terri’s hand instead and keeping it there, caressing it.

“You used my vibrator before!?” Terri whispered angrily. She shoved the vibe in hard, eliciting a gasp from Penny.

“Yes, once before,” she lied, thinking that she shouldn’t mention May’s involvement.

Terri realized something, and moved her free hand down to her own pussy as she manipulated the vibrator in and out of her sister’s. “I thought I had less lube than I expected…did you…use some of it?” She hoped.

“Mmm…yes…” Penny closed her eyes, enjoying the feeling of fullness when the vibrator went all the way in.

Terri flipped her fingers across her own clitoris. That meant that Penny had pushed some of Peardon’s sperm inside her on that day. She was getting all tingly…

“You know if you have sex with a guy you could get pregnant, right?” She pushed and pulled at the vibrator harder.

Penny was fast approaching her peak. “Unhh…yes…don’t worry; I’m not going to anytime soon…unhh…”

Terri was so close…”Aren’t you curious, though, to know how it feels to have a man cum inside you? Mmh…it feels so good, Penny.”

Penny’s eyes flew open. “You…when did you…?”

Terri leaned closer, her face close to her sister’s. “This summer…man cum…it’s so hot and warm…” She kept her eyes on her sister’s. “He could have gotten me pregnant as he spurted inside me…UNHH!” Terri lost her balance and fell onto her sister as she started to cum at the remembrance of Jeff spurting inside her, even as she was pushing more sperm inside her younger sister.

The sudden body warmth and the thought of a man impregnating her middle sister pushed Penny over the edge. “OHH! UNHH!” Deep inside her, her cervix spasmed, sucking up some of the semen that her older sister had pushed inside of her.

Both girls recovered from their powerful orgasms to find themselves intertwined like lovers. Embarrassed, they separated and Penny went to her own bed. Both girls were confused but satisfied.

Terri thought about the semen, almost certainly all Jay’s but possibly a small amount of Peardon’s, that she had just pushed inside her stupid, unknowing sister’s possibly fertile pussy. The image in her mind of her little blonde sister with a big baby belly gave Terri another quick orgasm. Mmm…

—

On Friday Terri calculated she was heading into the start of her fertile time. Sperm could survive for days in a warm, moist environment like a fertile young woman’s body, so she had to be careful. She put off Jay’s requests for another date; she didn’t know if she could trust herself. She would use Penny as a proxy for her dangerous kink until she got close to her next period.

That night, though, Terri had a change of heart. What she was doing to her sister was dangerous and potentially life altering. EXTREMELY hot, yes, but she would have to make sure to get some real lubricant and forgo using man cum on her sister.

Penny came into Terri’s room as she had done the last couple nights, but she looked tired. “I’m bagged from track meet. Make it quick, okay?” Then she lay down, pulled up her nightie and pulled down her panties, waiting.

Terri, contemplating this rude display, changed her mind back and dispensed with the small talk, making sure to give her sister an extra helping of cum that night. Fucking bitch, she thought.

—

Terri was washing the vibrator in the bathroom and wondering how she was going to get more “lube,” since she had used maybe three day’s worth of it on her sister that very night and had already told Jay to back off. When she turned the water off she heard an odd noise, muffled. It took a moment to identify it, but when she did her eyes widened and she had the answer to her quandary.

A few minutes later, back in her bed, she made herself cum hard on the vibrator — no sperm this time — thinking about her stupid sister’s womb being inundated with potent sperm. It was so fucking hot!

—

On Saturday the girls’ parents went out shopping, leaving Terri in charge of Penny. Penny, however, the blackmailing bitch, knew she was in charge. She ordered Terri to her room for an extended vibe session.

Terri was ready. She had obtained new sperm that very morning, and she couldn’t wait to use it.

It was particularly warm that afternoon so Penny undressed completely before laying back on Terri’s bed. Terri hadn’t seen Penny’s breasts since she had grown up. They were smaller than Terri’s, but well shaped with small nipples and areolae. They would have fit nicely into the palm of someone’s hand.

Terri was extremely turned on by this point, and decided to likewise strip all the way down.

Penny looked at her older sister’s body. Not as toned as her own, but nicely shaped breasts, and those long nipples! She had only been paying attention to the vibrator before, but her sister was actually quite sexy!

She gave her head a shake…eww, why was she thinking that? She was so turned on.

Terri brought out the vibrator and “lube.” “Why don’t you lay on your side?” she asked her little sister.

Penny complied, facing towards the wall, still on the bed. This way she wouldn’t have to be distracted by looking at her sister’s nakedness, she realized.

Terri dripped a good amount of semen onto the head of the vibrator, and then flicked it on. She pushed her sister’s knees up so she was in a kind of fetal position, which amused her, brought the head of the vibe to Penny’s puffy vaginal lips and then pushed the cum gently inside. God, she loved the sight of the potent seed going into her blackmailing sister’s unprotected pussy! It was a glorious feeling of schadenfreude, especially because of where she had obtained it from.

Since Penny wasn’t looking, Terri took the bottle of “lube” and squeezed it, spurting some around where the buzzing plastic phallus was entering her sister’s possibly fertile pussy. As she pulled the vibrator out partway it gathered the white cream around it, and then she ever so slowly pushed it inside. So…fucking…hot, she thought to herself.

Theresa lay down with her head by her sister’s butt so she could push the vibrator into Penny while diddling her own clit with her other hand. She could hear her sister’s breathing increasing in tempo as Penny got closer to her own orgasm. The thought that her stupid sister was going to orgasm on the sperm-laden plastic cock was bringing Terri closer to her own release.

“Cum…you are going to have a baby if you cum,” Terri thought projected to her sister. Penny’s breathing sped up…Terri pushed and pulled the dangerous cock in and out of her sister, faster and faster…

Penny started to cum, crying out her pleasure without the need to stifle the sound like at night. Terri felt the pressure on the vibe as it happened, and started to cum as well, spurred on by the thought of the sperm now being pulled deeper inside her cute little sister’s toned body.

—

“Tell me about the sex you had during the summer,” Penny asked…no, commanded her sister. They were taking a break after their second round with the vibrator, their heads next to each other on Theresa’s pillow.

Theresa had often thought of those weeks when she pleasured herself. “He went down on me.” She noticed her sister’s confusion. “He licked me on my pussy, and it felt so good that I didn’t notice he had gotten his penis out, and then he was fucking me.” Terri didn’t go into how she had been caught masturbating with Jeff’s used condom and a dildo, allowing him to blackmail her with his phone’s video evidence.

Penny’s eyes were big. “And he didn’t use a condom?”

Terri shook her head. “He wouldn’t let me talk. I couldn’t tell him he needed one.”

Penny pushed for more information but Terri told her she couldn’t because it was an actual secret that could hurt someone. She didn’t mention it was herself who would be hurt.

“Tell me more about the sex. Did it hurt?” Penny asked.

“No, it didn’t hurt,” Terri replied. “Like you, I had already taken my own virginity with something…my dildo, when I wasn’t careful enough. It was better than with that, though…he moved in ways I didn’t expect.”

Just like when Terri used the vibe on her, Penny thought. Maybe she would get into sex sooner than she had originally planned, if it felt that good!

Terri continued her story: “Then he was moving faster and I could feel his cock getting bigger and I knew he was going to cum.”

Penny was really turned on by the story, and pulled Terri’s closest hand to her pussy. Terri massaged Penny’s clit. She then got the bottle of “lube” and lined it up with her sister’s pussy.

Terri continued: “And then it happened: he was shooting his sperm deep inside me.” At that, Theresa pushed the tip of the bottle to the opening of Penny’s vagina and gave it a good squeeze. The remainder of the special sperm shot inside her sister’s warm, moist hole.

Terri then used the vibe to push as much of that sperm as far into Penny as she could, bringing her sister and herself to another shattering orgasm.

That night Theresa was able to masturbate herself to the thought of the very naughty things she had done that day. The previous night in the bathroom she had heard her parents having sex, and in the morning she had retrieved the condom from their bedroom trash. That afternoon she had pushed her father’s entire condom full of sperm into his youngest daughter’s pussy. The thought that Penny could now be unknowingly carrying her father’s baby made her cum HARD, again without having to put any sperm inside her own body. She was quite proud of herself.

—

On Sunday after church Terri went out shopping with her Mom so Penny invited May and their mutual friend Jessica over for some play.

The Korean teen had been looking forward to seeing Penny again and especially playing with Penny’s sister’s vibrator. Using it had been the most exciting experience of her young life!

Penny grabbed the vibe and lube, and then returned to her room. Jessica was shocked when she saw it but kept quiet. May had already told her this was a SECRET.

They let the redheaded Jessica handle the plastic sex toy until she was comfortable with it.

“Me first?” May asked. She had worn a skirt in preparation for this and was already pulling down her panties. Jessica held the vibe out to her. May climbed onto the bed and lay back. She pulled her skirt up and, after turning on the vibrator, tried to get it into her. Without lubrication she got some nice feelings from the vibrations but it was kind of uncomfortable.

“Here,” Penny said, opening the bottle of “lube”. They didn’t know that Theresa had actually replenished it that morning with another generous but unknowing donation from her parents, who it seemed had a healthy sex life. She squirted the “lube” onto May’s pussy lips. The vibe went in nice and easy after that.

Jessica’s pussy was afire watching this. Penny and May were so beautiful, each in their own way, but she herself was a bit of a tomboy, all skinny and angular. She watched as May pushed the plastic cock into her pussy, in and out. She went closer to the bed to get a better look, and she saw the “lube” mixing with May’s juices and running down between her asscheeks. May’s eyes were closed as she pleasured herself. She looked almost in pain.

Finally May arched her back. “Ih…huhuhuuhh…” she moaned, shaking and cumming on the vibe. Penny’s Dad’s sperm was pulled deeper into the teen girl’s fertile innards.

After a few minutes May recovered and Penny gingerly pulled the vibrator out of her pussy, eliciting a gasp and a mini-orgasm from May. Both girls looked at Jessica.

She was suddenly fearful. “Oh…um…no thank you. I…should go…” She got up.

Penny was there, taking her hand. “I know you’re turned on, Jess…look at your nipples.”

Jessica glanced down. Sure enough, her nipples were poking through her sports bra and were quite prominent under her t-shirt. She was really fucking horny!

Penny guided her to the bed. “Here…lay down on May. It’ll feel so good…”

Jessica was hesitant but there was a smell…was that pussy? She was in a dreamlike state as she lay back between May’s legs. May hadn’t had a chance to put her panties back on. She put her arms around Jessica, lovingly. As she did so her hands brushed Jessica’s right nipple through her clothes, sending a pleasant shock through the redheaded girl.

“Close your eyes,” Penny said. “Think about someone you really like at school, maybe Bob Steveston, or Jim Bradford?”

Jessica wasn’t sure she liked boys, not like that. She didn’t know what to do, but she did close her eyes. She felt May’s hands slowly moving on her chest…it felt good. She moved her hands to May’s legs, rubbing the outside of the Korean girl’s thighs.

May responded by tweaking Jessica’s nipples. Jessica gasped. That was good! She moved her hands on May’s legs faster, more urgently.

May tilted Jessica’s head toward her and then they kissed. Jessica’s senses were overwhelmed with the sex smell, May’s massaging of her small boobs, the pulling off of her jeans.

She raised her hips to assist. She trusted these girls. They wouldn’t hurt her. May had pulled Jessica’s shirt and sports bra up, and Jessica’s small boobies came free, her pointy nipples prominent. Her eyes were still closed.

She heard the vibrator turn back on and then it was at the mouth of her pussy. The vibrations felt incredible running through her pussy lips and clit, and she kissed back at May with ferocity.

Penny couldn’t get the vibe into Jessica at all, she was so tight. She was about to just coat the vibe in “lube”, but then had an idea from what Terri had done to her the previous day. She pulled the vibrator away and put the mouth of the tube right at Jessica’s small pussy hole. She squeezed hard, forcefully injecting a string of her father’s semen into the virgin girl. She then brought the vibe back up, dipping the tip into the cum that dripped back out. It started to push in.

After the vibe had been pulled away Jessica had felt a wet sensation and then the vibrations started again. It felt so good, her pussy stimulated by the vibe and her ultrasensitive nipples tweaked and rubbed by May as they kissed. She felt a stretching down there…it was strange and new, but good.

The tip of the vibe was able to push in but no further. Penny was at a loss. She watched Jessica and May kissing, the latter girl tweaking the nipples of the former, and had an idea.

Penny used her left hand to keep pressure on pushing the vibe in and brought her other hand up to Jessica’s prominent clitoris. The result was instant and dramatic. Jessica gasped into May’s mouth, pulled away and looked down at Penny. The look was of pure lust and excitement.

As Penny rubbed at Jessica’s clit the insistent pressure on the vibrator finally worked, and the tip pushed its way in. The vibrator hit the healthy helping of sperm that Penny had squirted into the skinny redheaded tomboy earlier, and since she been using her left hand on the vibe she didn’t have the fine control she needed to keep it from quickly pushing deep inside Jessica’s pussy. Unlike with herself, though, there was no hymen to cause problems. Jessica had ridden horses most of her life, and her hymen was just one more injury caused by that dangerous sport (she had also broken her arm when she was 11).

“Uhhhhaaa!” Jessica cried out. The feeling of fullness was near overwhelming. May pulled Jessica’s face to hers and started kissing her again to keep her quiet.

Penny kept rubbing Jessica’s clit and started to pull the vibrator out. It was moving much more easily now. She pulled it halfway out and then pushed it back in. It easily went in to the hilt this time. Penny was amazed.

Jessica felt something building. She had never orgasmed before, so she didn’t know what it was. She was one of those girls who just couldn’t cum using only external stimulation, and she never had a dildo or vibrator to help.

She kissed back at May ferociously as she built up to her first orgasm. Her strong, internal horse rider muscles gripped the dildo tightly, making it hard for Penny to move it. She pushed it all the way in and stroked Jessica’s clit faster.

Finally it came. May made sure to keep her lips locked to Jessica’s as she felt the skinny girl’s body tensing to release. Even so, Jessica cried out, “MMMMFFFF!!” Her back arched as the most intense feeling she had ever experienced overwhelmed her. Penny had to work hard to hold down the redhead’s legs as she exploded in pleasure.

In the recesses of virginal Jessica’s vagina, Penny’s Dad’s sperm raced through her cervical opening as it opened and closed repeatedly from her first orgasm.

Finally, it was over and all three girls were panting heavily. After a minute they heard footsteps approaching the room. Jessica and May rushed to get their panties on and Penny had managed to toss the vibe and lube under her bed by the time the door opened.

Her father poked his head in. “Everything okay in here?” His eyes went wide when he saw Jessica in just her t-shirt and underwear and he froze in the doorway, shocked.

Penny quickly spoke up: “Yeah, we’re fine. Jess got some makeup on her jeans so she’s going to borrow mine.” As if to illustrate her point she went to her chest of drawers and began rummaging in her jeans drawer.

Penny’s Dad was trying not to stare at skinny Jessica’s legs, underwear, and…her nipples were quite prominent through her t-shirt. The redheaded girl was actually quite cute, he decided. He hadn’t really noticed before.

He stammered, “I…um…okay. Sorry…I’ll…leave you alone.” He closed the door slowly, making sure to get an extra glance at Jessica’s cream-colored legs as he did.

—

That night, Penny’s Mom got fucked twice by her horny, lascivious husband, thinking about his cock embedded in a skinny young redhead’s pussy. Unbeknownst to them all, his sperm from the previous night was well on their way to their goal deep inside that same girl.

—

Penny tried to get Terri to use the vibrator on her, but all the “lube” was gone. Terri was uninterested in finding another way to lube her up, so sent Penny back to her room, unsatisfied. Penny was feeling guilty about using up all the lube, so didn’t push the matter.

Terri, of course, assumed her sister had put all of the semen inside herself earlier that day, and was able to make herself cum just thinking about it, once again safe without sperm inside her own pussy.

—

Terri was pleasantly surprised the next morning by the bounty of 2 filled condoms in her parents’ trash can. She cleaned the lube bottle and transferred the condoms’ contents into it.

—

Peardon approached Theresa at school for more fun, but she told him she was having her period and he backed off. She doubted that he would be able to remember the date if she had to use that same excuse in a couple weeks for her real period, but it was the only excuse she knew would keep him out of her pussy. She did not trust herself to not get filled with cum at this time of the month!

—

That night Theresa was really fucking horny due to it being her most fertile time. She had been playing with her nipples and clit when Penny slipped into her room. Finally!

Penny was likewise really horny due to the previous day’s sexy encounter with May and Jessica, and not being able to get relief the previous night. She removed all her clothes and got on the bed when she saw that Terri was likewise naked.

Terri had an idea. “We’re going to play a game, okay? We’re going to play ‘make me pregnant.'” Penny scrunched up her brow in confusion. Terri continued: “You got really horny when I told you about the bareback sex I had, right? We’re going to pretend that you’re having unprotected sex with a boy. In fact…” She considered. “You’re going to take it from behind, like I did one time, while I tell you about it.”

Penny was interested and super horny. She did as her sister directed, getting onto all fours at the head of the bed. She looked over her shoulder at her older sister. “How’s this?”

“Perfect,” said Terri, as she got the vibrator and “lube” ready. “We’re going to pretend that this lubricant is semen, okay? It’s pretty similar.” She smiled at her deception and made sure to put extra amounts of her dad’s semen on the vibe so it was practically dripping with the stuff. She pushed Penny’s legs further apart and lined the plastic vibrating phallus up with the younger girl’s pink engorged pussy.

Theresa continued, remembering her third time. Her second time had happened while she was mostly asleep. “He pushed my face into the pillow. I still wasn’t allowed to talk to him, so he still didn’t know he shouldn’t cum in me. Then he was pushing his cock inside.”

Terri nudged the cum-covered vibrator into Penny’s vaginal folds. Their father’s semen spread along the young girl’s tight pussy lips, and then when Terri pushed it in with more force the forbidden seed went in with it.

Penny sighed at the feeling of the slick vibrating cock going into her. This angle was different but nice.

Terri kept talking. “He fucked me for a few minutes. I wondered how I could let him know he had to pull out. I couldn’t do anything.”

In Penny’s mind’s eye she thought about her annoying middle sister getting fucked from behind by some faceless guy, no condom to protect her from pregnancy. The thought thrilled her.

Terri was moving the spermy vibe faster now. She used one hand to spurt some more cum on it, which mostly disappeared into her stupid, unsuspecting sister’s possibly fertile pussy.

She stopped moving the vibrator. Penny gave a disappointed groan. Terri continued her story: “Then he stopped fucking me and told me to start fucking back at him. Do it.”

Theresa kept her good hand on the vibrator and spurted more of her father’s cum where it was going into her sister’s pussy. The excess started to drip as Penny began pushing back on it, gathering speed.

Terri moved her other hand to her clit. This was so fucking hot. “He was making me fuck back on his hard cock, and that was getting him closer and closer to cumming inside me. I was right in the middle of my fertile time, Penny. I knew he would make me pregnant if he came.”

Penny was fucking back at the plastic vibe faster now, close to cumming herself.

“He was getting close…I could feel it getting bigger…”

Trying to keep her sister impaled on the vibrator while strumming her clit with her off hand wasn’t working, Terri realized. She switched hands quickly, able to hold the vibe in place with her off hand while slipping 2 fingers into her own pussy. It immediately felt ten times better to use her good hand! She was fast approaching her own orgasm. She was so wet!

Too wet! She looked down at the fingers that were still inside her own pussy. She had spurted so much of her father’s semen on the vibrator and her sister’s pussy that it had dripped onto that hand! When she switched hands she had taken her good hand, covered with the excess of her father’s sperm, and shoved it right inside herself!

She had already been so turned on at the thought of pushing her own father’s sperm inside her blackmailing little sister. She was right at the worst part of the month to get sperm inside herself. She was looking down at the cum on her hand, 2 fingers still inside her extremely fertile pussy. No…Daddy’s cum…no…

Terri was too close to her own orgasm, and couldn’t stop. She let go of the vibrator and fell back on the bed, furiously frigging her clit while thinking about the dangerous, forbidden seed that was now inside her pussy as her kink overwhelmed her. She groaned, “Cum…in me…cum…in…me…” Oh God, I’m going to have my Daddy’s baby! she thought. She was so close that she didn’t care about that, or possibly the thought of such a perverted thing happening spurred her on.

Penny flipped over when Terri let go of the vibrator and as she did so the vibe slipped out of her. She groaned, and then saw her sister desperately trying to make herself orgasm, muttering about cum.

Penny realized that recounting the memories of the unprotected sex she had during the summer must have overwhelmed her sister. She grabbed the vibrator and spurted some more lube on it.

Terri was rapidly approaching a huge orgasm, her eyes closed. Penny took the cum-covered vibrator and pushed it into her sister’s pussy. The plastic cock went in easily.

Terri was surprised when the vibrator went in, but then it felt 100 times better. She started to cum.

Penny was really into it now. She was going to do her best to help her sister cum. She whispered, “Take that cum! Take it and get pregnant!” She quickly pulled and pushed on the vibrator, bringing her sister off.

Terri, cumming hard, saw the vibrator going inside her was covered in more of her father’s sperm. That, and her sister’s hot words, extended her cum, expanding her pleasure until it overwhelmed her body. “N-uahh! NOAHHH!” Inside her very fertile body her cervix opened, thrusting its mouth into the pool of her father’s semen that she and her sister had pushed inside her vagina, sucking the sperm-rich cream up and into her womb.

Terri could see this in her mind’s eye as she came again and again. The thought only kept her orgasms going, her cervix plunging again and again into the dangerous pool of semen within her, pulling the seed deep inside where it would surely find her egg. As she lost consciousness she dimly realized that the baby would be both her child and sibling.

---