I never planned on fucking my sister, but there we were, the house dead quiet except for the rain hammering the roof. She walked into the kitchen in nothing but a thin tank top and panties, nipples hard from the chill, and I knew right then the line was gone.
"Can't sleep either?" she asked, voice low and rough like she already knew the answer.
I shook my head, eyes locked on the way the cotton clung to her tits. "You keep walking around like that and I'm not responsible for what happens."
She smirked, stepped closer, and pressed her body against mine. "Then don't be responsible." Her hand slid straight down to my cock, already stiff in my boxers, and she squeezed. "Fuck, you're hard for your own sister."
I grabbed her ass, hard, fingers digging in as I pulled her tight. "Yeah, and you're wet for your brother. Feel that?" I shoved my thigh between her legs and she ground down, soaking the fabric.
We didn't make it to the bedroom. I bent her over the kitchen table, yanked her panties aside, and drove two fingers straight into her cunt. She was dripping, hot and tight, clenching around me while she moaned my name like a filthy prayer. "Deeper, fuck me with your fingers, big brother."
I pulled them out, licked them clean, then freed my cock and slammed into her in one thrust. She cried out, pushing back to take every inch.
The table creaked as I pounded her, balls slapping her clit with every stroke. Her pussy gripped me like it never wanted to let go, wet sounds filling the room.
She reached back, spread herself wider. "Harder. Use me. Fill your sister's cunt."
I did exactly that, fucking her raw and fast until she came hard, walls pulsing, juices running down her thighs. I followed right after, burying deep and pumping thick loads inside her, watching it leak out around my shaft when I finally pulled free.
We didn't stop there. She dropped to her knees, sucked me clean while I held her hair, then climbed on top and rode me on the floor until we both came again. By morning we were still at it, bodies slick, every hole used, every dirty word said. No guilt, just raw need and the best fuck either of us had ever had.
