“Mark! Tina! We’re ready to go. Come down and say good bye,” Mark’s mother Susan yelled up at her children. Mark’s parents were going off on a weekend trip and were leaving him and his sister Tina alone for the first time. “Be very careful. No strangers. No parties while we’re gone. I’ve made up meals for you so all you have to do is heat them, or you can make yourselves sandwiches and such.”

“We’ll be fine, Mom. You and Dad go and have a good time. Teeny and I will probably just lay around and sunbathe or watch TV all weekend.”
“I wish you’d stop calling her Teeny,” Susan said. “She’s almost as tall as I am and still growing. She’s hardly teeny anymore.”
“She’ll always be Teeny to me,” Mark replied. “And, I’ll always be around to protect her.” Three year old Mark had called her teeny when they brought Tina home from the hospital and he saw his little sister for the first time. Teeny didn’t mind the nick name, but in her hurry to grow up she now claimed she was ‘almost fourteen’ even though her birthday was more than five months away. Teeny was definitely growing up though and it was obvious that she was developing a body that would mirror her mother’s. Moreover, Mark’s team mates all declared that his mom was ‘hot.’ Whenever any of them came over, they never failed to ogle his mother’s good looks and luscious body. Susan secretly enjoyed the attention.

Teeny was a natural exhibitionist and ever since she was about seven or eight years old, had many times ‘accidently’ allowed Mark to see and admire her naked body, even more so now that she had boobs and hips to show off. Mark never commented on this and Teeny never did anything like that when their parents were around.

After lunch, Mark stripped down and slipped into his bathing trunks, grabbed a beach towel and climbed out his window to catch some rays on the porch roof. After ten minutes on his back, he turned over on his belly. He caught movement out of the corner of his eye and glanced up at Teeny’s window. She was standing at her window gazing out but not at Mark, although it was obvious she knew he was there and that he could see her. She was naked. Her boobs were still small but round and shapely. Her hips had a nice flair from her small waist and she was starting to grow a muff around her cunt, though it was still too sparse to cover her puffy nether lips. Her left hand moved up to her right breast and she rubbed and rolled her nipple until it stiffened, and then her right hand moved to her cunt and started to massage her clit. Mark could see it all, including the ripples of her belly as she fingered her cunt. After a few seconds, she turned away and moved away from the window. Mark noticed that his cock had stiffened and he blushed at this reaction to his own little sister.
“Mark!” Teeny yelled. “Could you come here and help me?”
“Coming,” he answered as he got up and made his way to her bedroom. “What’s uh…” he gasped as he saw Teeny in her bedroom. She was wearing a one piece swimsuit that was way too small to fit her developing body. “Teeny! Where did you get that suit? If Mom sees you wearing that she’ll have a cow and you’ll be grounded for the summer.
“Carla gave it to me. She said it was too small for her. I just wanted to see what you thought about it.”
“Well, you and she are the same size so it’s too small for you as well. Your nipples are showing at the top and I can see your privates at the bottom. I think you should give it back to Carla.”
“But we wanted to show our suits to Charlie. We both like him and want him to like us. We want him to admire our boobs. And, maybe we’ll show them to him. And maybe let him touch them.”
“You’re both too young to be fooling around with boys like that. You could easily end up pregnant.”
“No I won’t. I’m on the pill.”
“How did you arrange that? Does Mom know?”
“No she doesn’t. And don’t you dare tell her. I went to the school nurse and told her I was having sex and she gave me the pills.”
“Why do you want to do this?”
“He’s so cute! And he makes us feel funny and weak just by being around us.”
“Why don’t you just masturbate when you get horny?”
“We do. We’ve even done it at the same time while we text him but it doesn’t seem to do any good. I still want more. It seems like I’m horny all the time and it gets worse when we’re around him. Maybe I’m not doing it right. Could you watch me while I do it? Maybe you can show me how to do it better. Please?”
“Alright. I’m not an expert but I’ll be happy to help if I can.”
Teeny quickly stripped her swimsuit off and then stood in front of her brother stark naked. With a half smile, half smirk, she slowly turned in a circle and let his hungry eyes enjoy looking at her fast-developing body. She laid down on the bed and spread her legs and then started to fondle her breasts with her left hand. With her other hand she caressed her lower belly and then let her hand drift down to her pussy. Her fingers located her clitoris and gently rotated around that sensitive button. She sighed as her fingers started to get busy. Mark’s cock started to get hard as he watched her. “Mark. Would you rub my boobs? Maybe that would make it feel better.”
Mark knelt on the floor next to her and started to fondle her breasts, rubbing and rolling her nipples with his fingers. “Ohh. That feels so good,” she sighed. “Keep doing it. Mmmm. Yeah. Like that.” Mark’s cock quickly responded by getting hard. Meanwhile, her fingers started to increase speed and pressure on her clitoris as her body responded to the double stimulation. “Mark?”
“What?”
“Would you mind if I rubbed it with your thing? I’ve never done that before.”
Without responding, Mark moved onto the bed and lay on his back. Teeny straddled him and grabbed his hard cock and moved it to her pussy lips. “Keep rubbing my tits.” She commanded and Mark quickly complied, squeezing and rubbing her small boobs. Teeny started to moan as the sensations grew ever more enjoyable.
Locating her clit with the head of her brother’s cock, she started rubbing it up and down her slit. Mark by then was lost in his own lust and leaked some pre cum, lubricating her pussy with his juices. Feeling the slippery difference, Teeny tilted her pelvis back and slammed her body down, driving Mark’s cock into her cunt, ripping through her cherry and ramming his cock deep into her body. “Ungg,” she grunted with the sharp pain. “Don’t stop. I want you to fuck me.” In this position, Mark could not pull out but then he realized that he didn’t want to stop. Instead he started to thrust into her, and Teeny quickly joined in, ignoring the pain which gradually faded as she reveled in a whole new world of sexual pleasure.
“Uh, uh, uh, omigawd that feels so good. Oh Mark. Fuck me. Shove your thing all the way in. Yeah, like that. Oh, uh, uh, I love your thing. Fuck me with it. I want to feel you cum in me. Cum inside me. Yes. Yess. Yesss. I’m going to cum. I’m cumming. Ahhaiiee.”
As she climaxed, her cunt squeezed his cock with unbelievable pressure and he spurted his cum deep into her cunt as he reached his own orgasm. Her cunt continued to spasm until he finished and he pulled out.
“Thank you, big brother. That was wonderful. You were wonderful. If I’d known fucking you was that good, I would have done you earlier.” She slid down his body and licked his cock clean, causing him to harden again. Teeny continued to lick and suck his hard cock until he came again filling her mouth with cum.

They lay together as they recovered, enjoying the glow and the aftermath of good sex. Mark put his arm under her head and started to caress her tits. Teeny responded by playing with his flaccid cock. “Your thing is amazing,” she said. “It’s so small now and it was so big and hard before.”
“It’s called a cock.”
“I’ll call it a cock when it’s big and hard. Right now I call it teeny.”
“Keep it up and cock will be back. Meanwhile I’ll take care of Teeny’s teeny tits.” Mark then turned and took her right nipple in his mouth while squeezing her left one, rolling her nipple with his thumb and fore finger. Teeny started to jack him off, and was delighted to see him quickly harden.
“Is that from my hand or from my tits?”
“Both. Keep it up and you’ll be ravished again.”

When it was fully erect, she said, “Please fuck me again. Stick your hard cock in me. I want you to make me cum again.”
Mark rolled over her and settled his pelvis between her legs. He reached down and pulled her knees up over his shoulders and then guided his throbbing hard cock to her wet cunt, then drove it all the way into her with one thrust. “Ahh,” she cried. “That hurts.”
Ignoring her cries of pain, Mark humped furiously until he spurted more hot cum into her tight twat. Teeny’s orgasm quickly followed when she felt his hot seed spurt deep inside her.
“Will it hurt like that from now on?” she asked as they laid together.
“No. But it may take a day or so for your cherry to heal. Then it won’t hurt anymore.”

That night, Mark awoke when he felt two small tits rubbing his bare back and a small hand softly stroking his cock which was already hard and ready. Reaching back, he ran his hand over Teeny’s ass and then moved his hand between their bodies until he located her mound, already wet and swollen with lust and desire. Mark turned his body around and began to squeeze and caress her tits, then moved his hands back down to her pussy. When he slipped his finger into her, she whispered, “Fuck me again.” She grabbed his cock and started to rub it on her clitoris. “I want your cock inside me,” she said. “Please. Please stick it in me and fuck me. I want to feel your big cock all the way inside of me.” Mark discovered that his cock grew harder and bigger as she continued to quietly beg him to fuck her.

Mark rolled on his back and Teeny quickly straddled him and then brought his cock to her entrance and used her weight to force Mark’s hot cock into her cunt. “It doesn’t hurt,” she cried and started to hump him hard and fast. Matching her rhythm, Mark thrust up into her young body. As his body produced pre-cum into her already wet and ready hole, he was able to drive the full length of his cock into her with each stroke. Soon they found that Mark’s cock could come all the way out of her body before driving it deep back into her hot little pussy.

“Ohmigawd,” she moaned. “Oh, I love it. Fuck me, fuck me, fuck, fuck, uh, uh, I’m getting close. Fuck me faster. Harder, Oh, oh, ohhhhh,” she screamed as she reached her climax and clamped her cunt on his cock. Mark did not cum, but slowed his strokes as Teeny came down from her orgasm. “That was great,” she sighed when she could speak again. “It was,” Mark replied, “But we’re not done,” he said as he moved his hips so she could feel that his cock was still hard and still deep inside of her.

“Oh, Mark,” she cried as he started to rotate his hips, which caused the head of his cock to rotate in the depths of her cunt. Mark slowly started to thrust into her and she quickly responded with another small orgasm. Teeny rolled on her back pulling Mark on top of her managing to keep his cock inside her cunt as they changed positions. Mark slowly drove into her until he felt his orgasm coming close and start to drive hard and fast into her. He came with a groan, and Teeny quickly followed when she felt his hot cum spurt into her body. Her orgasm triggered her cunt muscles to milk every drop of cum from her brother’s cock.

“Mark?”
“Hmm?”
“Do you think you could fuck Carla too?”
“What? You want me to fuck her?”
“Well, actually, she wants you to fuck her. She’s had a crush on you for like forever. Would you? Please? She’s coming over tomorrow and Mom and Dad won’t be back until Sunday. We will have all day tomorrow to fuck each other.”

To be continued…