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.

—

Stepsister Sleepsexing Surprise (MF, inc, nc, oral, impreg?, reluc, safe, viol)

by Krosis of the Collective

—

I opened my apartment door and let my sister in. As she shuffled past I noticed a bruise under one eye. I didn’t ask. She had called me out of the blue a few hours before to ask if she could stay with me for a while, and now I was pretty sure I knew why.

Regina (I call her Reg) was a big woman — not fat, but tall and proportionate — an Amazon with an hourglass figure. Unfortunately, her husband was just as big. I had always disliked him, and it seems I was right to do so.

Reg slumped into a kitchen chair and held her head in her hands. I stepped forward and put my arms around her. She seemed surprised but returned the hug after a moment.

“Stay as long as you like,” I told her.

“Thanks, little bro,” she said.

—

I’d known Reg since we were 8 years old. We were the same age…our parents, both divorcees, had married and suddenly we were family. Having been an only child up until that point, I was delighted to have a sibling, even if it was a girl.

We had gotten along well. Though she had always been bigger than me she had never used her size to win fights. The size difference was why she had always called me “little bro”, even though I was actually a couple of months older than her. She was currently 6′ tall and I was only 5’9″.

My feelings toward her became more confusing after we hit puberty. Suddenly she sprouted boobs and her hips swayed as she walked and I couldn’t keep my eyes off of her. She seemed amused by my attentions but because we had been family for half of our lives by that point she was off limits. It didn’t stop me from whacking off thinking about her most nights, though.

—

Now, at 25 years old, we had known each other for over two thirds of our lives, though we hadn’t talked much since she had married Brad and moved to the big city a couple of years ago.

She was even more beautiful now, the vision of a Greek goddess in all her glory, except for the black eye. I pulled back from our hug, quickly turning away to hide the hard-on that I had sprouted.

—

Since I lived in a one bedroom apartment I graciously gave up my bed to her and took up residence on the couch. It wasn’t as comfortable as my bed, but it was better than sleeping on the floor.

Hm…I had said that she could stay as long as she liked, hadn’t I? Hopefully not so long that my back was mangled by the couch! Still, it was good to see Reg again. I missed her.

We had Chinese food delivered and talked about stuff, though we definitely didn’t talk about why she wasn’t at home with Brad. When she was ready she would tell me.

—

That night I awoke to the sound of Reg crying out in fear. Thinking that Brad had somehow found her here I was up in a flash, rushing into my bedroom to defend her. I was so concerned that I didn’t even think about the fact that I was naked.

I stopped when I saw by the dim light coming through the window that no one else was in the room. Reg was thrashing violently on the bed, mewling and calling out, “No…” over and over.

I rushed forward, jumped on the bed and gripped her shoulders. “Reg!” I called out, “Wake up!”

A flailing arm whacked me across the cheek and I fell to the side. After my ears stopped ringing I lunged forward again, this time between those windmilling arms, and wrapped my body around hers, my face tucked into her neck.

“It’s okay,” I whispered. “You’re safe…you’re here with me, and I’m not going to let anyone hurt you.”

Slowly, Reg’s arms and legs stopped thrashing. I repeated words of assurance, letting her know with soft but urgent whispers that everything was alright. I felt her finally relax.

That was when I noticed that not only was I naked, but so was Reg, and she had kicked off the sheets so that there was nothing separating her body from mine. I could feel the heat of her skin, and especially the sizeable mounds on her chest, pressing into mine.

My cock suddenly sprang into action, filling its 6 inch length with blood so fast that I was left light-headed…or maybe it was the blow to the head? I also realized that I was between Reg’s thighs.

“Mmm…” Reg sighed as she wrapped her arms around my back. Then she pulled my head toward hers and kissed me.

I was locking lips with a forbidden woman I had desired since I was a teenager! Somehow my dick got a little bigger. Its head bumped something down there.

“Mm-hm…” Reg hummed into my mouth as she opened her mouth and stuck her tongue between my lips. I felt the tip of my cock moving along soft skin as she adjusted her hips.

I’d like to think that if I hadn’t just woken up out of a deep sleep, or maybe hadn’t just taken a blow to the head, that I would have broken the kiss and gotten the hell out of there. But what happened, happened, and what was happening right then felt too good to stop.

I returned the open mouth kiss, my tongue dancing with hers. The tip of my cock was now someplace very warm. I instinctively pushed my hips forward. I could feel soft, warm flesh part from my insistent pressure. The wet heat of Reg’s vagina was now surrounding the head of my cock.

It felt incredible! Both of us moaned at the pleasure of it. We kissed more passionately and I felt her legs cross behind my back. Then as she pulled me toward her my cock moved almost halfway inside. We gasped in unison.

I broke the kiss and started to nibble on her neck. She made pleasurable noises and I tried to pull out a bit in order to get a better angle to thrust with but her legs were holding me fast. Then she started to roll her hips.

I had never felt anything like it before. Her vagina pulled on my cock, angling it up, and then she pushed forward, angling it down. Her legs pulled me forward again and my dick slipped all the way inside her.

“Uhh!” I heard her groan. I think I groaned as well, but I was lost in the sensations. The walls of Reg’s pussy rippled around the shaft of my cock, which had never been harder. Was she cumming already?

It seemed so: “Uh! Uh! Uh!” she cried out as her hips continued to roll and her pussy clasped at my cock. I realized that with these incredible sensations that I wasn’t going to last!

‘I should pull out!’ some vestige of reason called out from somewhere in my mind. I tried to do just that but Reg’s legs were still locked behind me, holding me fast. ‘Oh shit!’

I couldn’t pull out, and my sexy Amazonian stepsister, who I had fantasized about since I could masturbate, was orgasming hard on my dick, stimulating it to release. I had no chance. I felt the pleasure start to overwhelm me as my cock swelled up even more. ‘No, no…’ I thought as another part of me said, ‘Yes, yes…’

I grunted as my cum raced up my hard shaft and out the tip, injecting itself deep inside my orgasming stepsister and splashing against her cervix. I had no idea if Reg was on the pill, but she wouldn’t have initiated unprotected sex if she hadn’t been safe, right? Right?

Reg continued to gasp and roll her hips, her spasming channel urging more seed from my balls. Another orgasm washed over me, and more bolts of sperm-laden semen shot right where nature intended for them to go. I had never had multiple orgasms before! Reg’s body was incredible!

Finally, shaking, we both collapsed. It took a few minutes for my breathing to return to something close to normal, but when it did I noticed that Reg was snoring.

Snoring? It was a guy thing to fall asleep after sex, but I had heard that sex energizes most women…that was why they wanted to talk while I was struggling to keep my eyes open after doing the “horizontal mambo”. Even if Reg was tired she shouldn’t have fallen asleep right after sex…

…unless she had been asleep the whole time! Did she just fuck me while dreaming?

I suddenly felt like a total piece of shit! I carefully pulled out of her. Yep, she was still snoring. What had I done?

I covered my sister up and went back to the couch. In the morning she would either mention what we had done, or not.

It was a long night.

—

In the morning Reg made bacon and eggs for us. She didn’t say anything about last night, making me suspect that she had in fact been unaware of our illicit coupling.

I wondered if I should ask her about birth control, but what reason could I give for asking? In the end I just left it alone. Either she was or she wasn’t, and if her next period didn’t arrive then that would answer the question.

I wanted to take her to a movie but she didn’t want to go out. We watched TV. At one point she laid her head on my shoulder and I put my arm around her. She smelled so nice that I had to adjust the way I was sitting so that she wouldn’t see my hard-on.

She made dinner as well…spam, scalloped potatoes, and green beans. It was nice having someone in the apartment that could cook…I didn’t even realize I owned a can of green beans.

—

That night I was again awoken to Reg’s desperate cries from the bedroom. I had slept naked again by habit, but was smart enough to approach the bed from the side this time. I timed my approach and then when she thrashed away from me I slipped into the bed next to her and rolled her the rest of the way onto her side, which actually required some force due to our size difference. I gripped her around the midsection firmly but lovingly, and got my mouth next to her ear. Again I told her that she was safe, that no one would hurt her; I wouldn’t let them.

After a couple of minutes of me whispering assurances into her ear she relaxed. She smelled so good. My hand lightly caressed her firm tummy. My cock was hard again, wedged in between her buttcheeks.

“Mmm…” she moaned, reaching back to grasp my cock. I moaned at the pleasure from her grasp.

But I had to make sure if she was awake or not. “Reg?”

“Mm-hm?”

“Are you awake?”

She turned a bit to get some leverage and started to pull on my cock. “Mm-hm…” she mumbled.

I was no longer thinking with my big head, so that was good enough for me. I stretched to open the side drawer and extracted a condom packet. While Reg expertly reached back and whacked me off I ripped it open.

I pushed her hand away and got up onto my knees. I quickly slipped the lubed prophylactic onto my member and grabbed her upper leg, lifting it high while keeping her on her side.

“Mmm?” Reg sighed. I put that leg over my shoulder and lined my cock up with her pussy. The condom’s lubrication and Reg’s own juices helped me to push half of my dick inside her without trouble. We both moaned.

I pulled back a bit and then pushed again. Three quarters went in. It felt so good! I swirled my cock around, making Reg squeak in pleasure, and then pulled and pushed some more until I was buried all the way inside of my stepsister’s forbidden depths.

I hadn’t had any chance to explore Reg’s body the previous night. As I began to thrust into her I reached forward and grabbed a big handful of boob. Magnificent! I had fantasized about them, and the reality did not disappoint.

I continued to fuck my beautiful, possibly sleeping stepsister, taking my time. With the condom on I wasn’t on as much of a hair trigger as the previous night. I went slow, then sped up, and then thrust only the head in and out quickly, making her gasp. I lightly tweaked one of her nipples. Finally I pulled almost all the way out before embedding myself as deep as I could inside her. I continued the long thrusts, and before long I could feel Reg cumming. Her pussy gripped my cock — squeeze, squeeze — all along its length. It was incredible how she could do that!

Once Reg stopped cumming I moved back into the missionary position, easily sliding my cock back into her. I wanted to kiss her again. As our tongues intertwined I could feel my orgasm approaching.

Not having to worry about making her pregnant this time, I enjoyed myself and let go, thrusting myself as deep inside her as I could. My cock throbbed, filling the head of the rubber with my seed.

When I could catch my breath again I carefully slipped out of her and used some tissues from the side table to clean myself. I was about to toss the used rubber into the trash when I heard Reg snoring again.

Ah crap. Once again I wasn’t sure whether she had been awake or not. If she hadn’t been awake and later saw the rubber in the trash then there would be some difficult questions. Instead, I buried it under some stuff in the kitchen garbage and went back to the couch.

—

In the morning I gave Reg a peck on the cheek as I went off to work. She seemed happy, and again made no mention of our nocturnal activities.

When I got back home she had cleaned the entire apartment! My bathroom sink had been practically caked in grime and now I could see the original white of its porcelain. Yes, there were definite advantages to having my sister here: good cooking, cleaning, and…lover? I still didn’t know if she was aware of what we had done the last couple of nights, and if she wasn’t I certainly couldn’t tell her or she’d think I had raped her!

Had I raped her? Both times she seemed to enjoy it…you can’t rape the willing, right? Right?

—

I woke up as I had the previous two nights, hearing my sister in distress. I had worn my boxers to bed so what had happened before wouldn’t happen again.

As I made my way into the bedroom I calculated a good angle to approach Reg to calm her down. I didn’t want her to smash me in the head again but I definitely didn’t want her nightmare to continue…she sounded desperate!

This time she had managed to rotate her body 90 degrees so her head was near the side of the bed. I approached that side, knelt down so my head was close to hers, and again told her she was safe, that I would make sure of it.

She wasn’t calming down. I had to touch her so she would feel assured. I leaned forward and pushed my mouth to hers, upside down like in the Spider-Man movie.

“Mmph…” she mumbled, still thrashing. I held her head and started to plant tender kisses on her lips. Within a minute she had calmed down and was kissing me back. My dick was tenting my boxers by this point.

I pulled back, standing up. I had broken her nightmare and left her body unviolated. I felt like a proper brother.

Right until she grabbed my dick through my shorts.

I gasped at the unexpected pleasure. She pulled on my member as best she could, but when she found that my underwear got in the way she yanked them down. Though I was shocked by that move, her next blew my mind.

With her head still upside down compared to mine, she pulled me forward by my cock and sucked it into her mouth. Holy shit! It felt incredible. I wasn’t going anywhere with her doing that.

With the angle she wasn’t able to do much beyond suck, so I helped by thrusting. “Mmm…” she moaned, the vibrations adding to the pleasure as I slid my cock in and out.

Then she pulled away. I thrust into cold, empty darkness a couple of times, confused. Then I felt her grasp my cock again, rotating me and then directing me backwards onto the bed. She was only trying to get me into a sitting position on the edge of the bed next to her kneeling form, so I let her. When I was in position she dropped her mouth back into my lap.

I closed my eyes and enjoyed her attentions. Brad was losing out on a treasure because he had been an abusive bastard, and I was benefitting from his loss. Served him right.

I was getting close when Reg stopped. When I opened my eyes her incredible rack was taking up my entire field of vision as she climbed astride me.

No, I couldn’t let this happen again! I had to get up! But Reg was sitting in my lap now, and I didn’t have any leverage. I tried to roll to the side…

Wham! Something hit me across the cheek and stars exploded behind my eyes. What had happened?

Reg had taken advantage of my momentary confusion by getting her pussy lined up with my cock. She settled down into my lap and her hot, wet hole engulfed my shaft. She gasped and I think I did too, though it was hard to tell because my head was still ringing.

Reg started to bounce on my cock, her wet pussy easily accommodating my member, which had not softened, even with the momentary pain…had she hit me?

Reg pulled my head into her boobflesh. In any other setting I would have been in heaven, but I couldn’t have unprotected sex with my stepsister again! I tried to pull away, to push her away.

Wham! Now my other cheek was on fire. My head was ringing. A nipple was pushed into my mouth and I instinctively started to nurse on it. Pain…why? Mommy?

I could hear Reg’s breathing quicken, and felt her pussy muscles tightening. Her bouncing became frenetic. My head felt full of cotton, though the sensations on my cock felt incredible. I sucked harder on that nipple.

“Uahh! Ohhh!” Reg cried out and I felt her insides grip my cock as she continued to bounce on it. I had already been close to cumming when she had stopped the blowjob. The…slaps?…had slowed things down a little, but when you’re experiencing enough pleasure sometimes it’s difficult to tell between that and pain.

I heard ‘Oh no!’ somewhere in my head as I felt Reg’s vagina urge my cock to give up its prize, and it did. I pulled my mouth from her nipple and grunted, all the muscles of my body tightening as my balls gave up their sperm, combined that seed with a rush of semen from my prostate, and the whole potent mixture shot up my cock shaft, blasting into my stepsister’s possibly unprotected reproductive system.

Reg started to shake as the orgasmic feelings were amplified by the warm, wet feeling of my cum splashing deep inside her. “M-uhh! N-aah! Uhh…”

I fell back onto the bed as her body extracted the last couple of spurts of my cum. She collapsed upon me a moment later, trapping me under her, and then she started snoring again.

It took maybe 15 minutes of wiggling to extricate myself from under my nocturnal Amazonian lover. It was difficult, as she smelled so good that my cock hadn’t flagged much after filling her up with cum.

Never again, I told myself.

—

The next night when I heard Reg crying out in fear I just laid there. I was quite proud of myself, though torn because I wanted to help her…or was it to help myself?

Her nightmare lasted for a good 15 minutes or so, and then stopped. I sighed. Five more minutes and I would have gone in there anyway.

I closed my eyes and returned to sleep.

—

I had a dream that I was in my own bed and Reg was with me, as my wife. She kissed me and took my hard cock into her hand, stroking it, readying herself to mount me.

As she did I woke up on the couch, but Reg was actually on top of me, her slick, warm pussy sliding down my already hard cock! We both gasped at the incredible pleasure. She started to bounce on it.

“Reg!” I called to her. “No, we can’t…”

Wham! I had actually seen her backhand me this time. My head filled with static, like an untuned television.

I think I went away for a bit. When my faculties came back I found my hands were gripping Reg’s hips, urging her to bounce harder on my cock. I was already getting close.

It seemed that if I tried to wake her she’d hit me. I was torn between trying to protect my sister, not wanting to get hit again, and wanting to fill my sexy stepsister with my seed.

The last two desires won out. I cried out and arched my hips up, spurting my seed deep into Reg’s welcoming depths. As she felt me give up my precious bodily fluids she gasped and started to cum as well, jamming her hips down hard in order to maximize penetration.

Once we had both calmed down, instead of collapsing on me as she had done before, Reg slipped off of my cock and staggered back to the bedroom on unsteady legs. Within a minute I heard snoring.

—

The next morning I spotted Reg in the bathroom, massaging her boobs through her shirt. She caught me looking in the mirror.

“They’re a bit sore,” she said, embarrassed. “Fertile time of the month, y’know?”

I nodded, and then instantly regretted it. Pain flared behind one of my eyes and I winced. Reg noticed, putting on her serious face. She pulled me into the bathroom to get a look at me in the better light, touching me under my eye. I winced again.

“Did someone hit you?” she asked.

Her own shiner had actually faded over the past few days and was nearly invisible. I nodded.

She was instantly angry. “Who was it? I’ll kick their ass!”

I flinched back from her.

“Talk to me, little bro.”

“I can’t.”

“Then I’ll tell you something, and then you’ll tell me.” She directed me to sit at the kitchen table and joined me. She took a breath to prepare herself, and then she told me why she had left Brad.

Things had been great between them while they were engaged, but once they were married and had moved away from the rest of her family things changed. He became possessive, not letting her out of his sight, keeping her at home and controlling the money so that she had no freedom.

Worse, she was sure that he had been raping her at night. When they had sex during the day, which was not often, they had always used condoms, but she had come up pregnant twice in the last year when they hadn’t even had sex for several weeks before, plus she had half-remembered dreams of him fucking her at night.

Brad didn’t want babies so he made her have an abortion both times. He had even said that she had initiated sex with him so it was her fault! She didn’t have the guts to call him a liar.

Finally, she woke up one morning with a black eye and a sore pussy, and that was the last straw. That asshole had even said that it was self defense! Once he went to work she left him, packing up a few things and using the little money she had hidden away from him to come to my place, and that’s where this story started.

I couldn’t believe it: sex at night…fighting back in self defense…it was all happening again, but this time to me, and I wasn’t big enough to fight back…not that I would have anyway!

She looked into my eyes. “Please tell me who hurt you.”

I looked back at her. “Tomorrow,” I said, “I’ll tell you tomorrow.”

—

It took me a while to get to sleep that night.

Sure enough, at some point Reg started to cry out in distress. I kept my eyes closed and waited.

This time her nightmare only lasted maybe 10 minutes. A few minutes later I felt the covers being pulled off of me. I still kept my eyes closed.

My boxers were pulled down and then I felt Reg climb astride me. At this point I opened my eyes. As expected, my naked, sexy stepsister was getting ready to fuck.

“Reg, wake up!” I said.

I mostly managed to block the backhand this time, though my forearm hurt from the blow. Reg reached down with her other hand, grabbing my already hard cock and lining her pussy up with it.

“Reg, please!”

Again I managed to block the blow, but only barely. The bridge of my nose stung from the glancing hit.

Reg sank halfway down on my cock.

“Unhh…Reg, you’re not on the pill.”

Wham! I didn’t manage to block that one, and…

…I had gone away again. By the time I came back Reg was getting a good rhythm going as she bounced on my dick, which had only softened a little. Her large, beautiful breasts bobbled up and down as she rode me.

I tried again: “You said…it was your fertile time of the month, Reg.” She didn’t try to hit me this time, though she seemed to bounce a little harder and faster.

“There’s no condom…if you keep doing this you could get pregnant!”

She moaned, “Mmm…” and leaned forward, kissing me passionately, and I returned the kiss. Actually vocalizing the danger she was in was turning both of us on!

She sat back again, arching her back to get greater penetration. I continued talking. “You don’t want your brother’s baby, do you?”

I felt Reg cum at hearing that, her magnificent pussy gripping my cock. Such an incredible feeling! I don’t know how I managed to keep from cumming myself.

“Reg, please stop.”

Wham! That blow popped me in the mouth. I felt pain behind my front teeth.

After Reg finished cumming she started to kiss me again. Even with the pain in my mouth it was sexy as hell, and I could feel I was getting close.

I broke the kiss and put my hands in front of my face. “Reg, I’m gonna cum.”

She started to pull herself up so only a quarter of my cock was still in her, and then she slammed herself down hard. She kept doing this, bringing me ever closer to the inevitable.

“If you don’t stop…we could make a baby together, Reg! Oh God…oh…”

The sexy pregnancy talk sent us both over the edge. I thrust my hips up as Reg slammed hers down, and then she ground her pussy into my crotch. Her pussy muscles once again rippled along the shaft of my cock. I cried out as my potent, forbidden seed roared up my cock shaft and saturated my stepsister’s fertile insides. Her cervix spasmed open and close as she orgasmed, allowing dollops of my rich, babymaking cum access to her most precious, private place.

Our mutual orgasm seemed to last forever. I had never cum like that before, and I wouldn’t have been able to move even if Reg hadn’t been on top of me.

Finally, Reg gave me one last kiss and again toddled off back to the bedroom. I looked over at the bookshelf, at the constant red light of the camera I had borrowed from a friend earlier in the day telling me it was still recording. I pulled my boxers back up, then the covers, and turned away from it.

—

In the morning Reg freaked out at seeing my battered face. I sat her down and replayed the tape, and then the real freakout began.

It was obvious from the recording that I had not influenced or taken advantage of her nocturnal behavior (I didn’t mention the first couple of times when I hadn’t been so gentlemanly). Reg collapsed onto my shoulder, crying.

“I’m so sorry, little bro! How can you ever forgive me?”

I hugged her tightly. “Of course I forgive you,” I said, “I love you.”

She sat back at hearing this, searching my face. Then she thought of something: “Oh shit! What if I’m pregnant? How long has this been going on?”

“Almost a week,” I replied. “At first I thought that you were awake, but when you started to hit me I knew that it wasn’t really you, but if I tried to stop you you’d hit me some more. I didn’t know what to do!”

She put her head back down on my shoulder and lay there for some time while she continued to think. Again she sat up straight.

“Wait…so Brad was right after all? I jumped him in my sleep? Oh God, if I hit him and he really did just defend himself…” She touched under her eye.

I took her hands. “He was still keeping you locked away. This…sleeping issue…might have been caused by how he was treating you.”

Reg nodded. “Heh…it’s funny, but I had actually lost my libido after a few months with him. I guess I had only transferred it to ‘the night shift.'”

We sat there for another long while. Finally, I asked, “So what do we do now?”

She looked at me. “I’m not going to have another abortion, even if it’s your baby.”

“Thanks,” I replied, hurt.

“Not like that!” she said, giving me a light punch on the shoulder and then immediately looking regretful. “I’m still your sister, even if we don’t share the same blood. People wouldn’t understand.”

I nodded. She was right…she usually was.

“It…might be Brad’s…” she began.

I looked at her doubtfully.

“Well, maybe. I expect I fucked him before he gave me the black eye. Any which way, if I’m pregnant I’ll just say it’s his.”

I was disappointed. I had thought that maybe the way Reg acted at night revealed some hidden subconscious lust for me…or even love.

Reg looked sideways at me, chewing her lip. “Can I still stay with you?”

“Of course! But what about ‘the night shift?'”

She leaned forward and gave me a light kiss on the lips. As she got up from the couch she winked at me and said, “Well, don’t fight back and you won’t get hurt, right?”

---