We were stuck in the house all weekend with the parents gone. Jess was nineteen, I was twenty-one, and the place felt too damn small. She walked around in those tiny shorts that barely covered her ass, no bra under her tank top, nipples poking out like she wanted me to notice. I caught her staring at my crotch more than once. One night after a couple beers she just said it straight: "I bet your cock is bigger than any guy I've fucked." That was all it took. I grabbed her by the hips, spun her around, and yanked those shorts down. Her cunt was already wet, shaved smooth and glistening. I dropped my pants and shoved my dick right in from behind, no slow shit, just balls-deep in one thrust. She moaned loud and pushed back, taking every inch like she'd been waiting for it.
"Fuck me harder, bro," she grunted, voice raw. I slammed into her, skin slapping loud in the quiet living room. Her tight pussy gripped me like a fist, hot and slick, juices running down my balls. I reached around and rubbed her clit fast and rough while I pounded her. She came quick, cunt pulsing and squirting a little on the floor. I didn't stop. I flipped her onto the couch, spread her legs wide, and drove back in missionary style, watching her tits bounce with every thrust. "Your sister's cunt feels so fucking good," I told her, and she grinned dirty, wrapping her legs around me. We fucked like animals for twenty minutes straight, switching positions every time she got close again. Doggy on the floor, her riding me on the chair, then me pinning her against the wall with her feet off the ground.
She begged for it rougher. "Cum inside me, fill your little sister's pussy." I lost it, gripping her ass and unloading deep, thick ropes pumping into her while she shook through another orgasm. We didn't even clean up right away. We just lay there breathing hard, my cock still twitching inside her. Later that night she came to my room naked and climbed on top again. This time she sucked me first, sloppy and deep, gagging on it before sliding down and grinding her soaked cunt on my shaft. We talked filthy the whole time, her whispering how she'd wanted this for years, me telling her she was the best lay I'd ever had because it was so wrong and hot. Round two lasted longer.
I made her cum three more times before I shot another load across her tits and stomach.
By morning we were still going at it in the shower, her bent over the sink while I fucked her from behind again, water running down our bodies. It was amateur as hell, no fancy moves, just raw need and dirty words. We knew it was fucked up but neither of us cared. We kept it going all weekend, every room in the house marked with our cum and sweat. When the parents came back we acted normal, but every time we passed in the hall we'd smirk, already planning the next chance to sneak off and fuck like the horny siblings we were.
