I don't know how it started, but my sister Laura and I m****ted each other for years, up until puberty, then she stopped. So then i started grabbing her any chance i had, just to squeeze her big tits until one night alone in the car.
We had gone to drop someone off, and i realized we were alone for the ride home, i was rubbing her thighs, her pussy and she was trying to push me off and sit as far from me as she could. So i pulled over on a dark road, jump to her side, and kinda sat on her. i lifted her shirt and bra and her magnificent breasts just popped out. Dark Pink nipples, not too big or small, and with my cock hard as a rock, i put it between her tits and started fucking, she kept asking me to stop, which I did after blowing my load on her chest and a little on her face, then a curtain of shame...that wouldn't last.

Not long after we were home alone together, she was wearing short and a tank top, when she realized we were alone together she tried to leave, but i cornered her in the room and as i walked towards her she threw her body on the bed face first as to shield her boobs from me. she was begging me not to touch her but my dick was getting harder with every passing second, as she lay on the bed face down, i went and laid on top of her and started grinding my hips. i tried to pull her shorts off but wasn't able to, so i pulled off my pants and put my dick up her shorts leg. She squirmed and wiggled trying to get me off but instead her shorts rode up and giving way to my member. The next thing I feel is my cock penetrate Lauras asshole, she screamed the moment it went inside her, I pumped my hips 3 times shoving every inch in her the 3rd time blowing the biggest load i ever had.

She threatened to tell on me if i ever touched her again, so it was almost the end, until i caught her trying to sneak out. Laura begged me not to tell, but she still wanted to sneak over to her boyfriends house. I agreed to play along but for a price. I could see in her face she knew where I might be going. I approached my little sister and started fondling her, she asked if there was anything else she could do, i didn't say anything, just turned her around and positioned her hands on the side of our house. I start pulling down her sweat pants and i can hear her starting to sob, I pull out my Penis and after a few minuets struggling, i finally squeeze it in, making her gasp. she was trying to hold back her tears as i pounded her tight pussy, but couldn't. i should have told her i was gonna cum but i just blew my wad insider her. and then she was off to fuck her boyfriend. so i stayed up late catching her every time and sending her full of my cum to get fucked again.