We were both adults when it happened. I was twenty-three, home from college for the summer, and my sister Emma was twenty-one, working nights at the bar downtown.
Our parents were out of town for the week, leaving the house empty except for us. The first night alone, the heat in the place was thick and the air conditioner was broken. Emma came home late, her tank top clinging to her tits, shorts riding up her ass. She kicked off her shoes and flopped on the couch next to me.
"Fuck, it's hot," she said, wiping sweat from her neck. Her nipples poked through the thin fabric.
I couldn't stop staring. We'd always been close, but lately the way she looked at me had changed. "Yeah," I muttered, shifting because my cock was already getting hard just from her being near.
She noticed. Her eyes dropped to my lap and she smirked. "You jerking off out here or something?"
"Shut up," I said, but my voice was rough. She leaned closer, her bare thigh pressing against mine. "Make me."
That was all it took. I grabbed her face and kissed her hard, tongue shoving into her mouth. She moaned and climbed onto my lap, grinding her pussy against my cock through our clothes. "Been wanting this," she whispered against my lips. "Your big dick in me, big brother."
I yanked her tank top down and sucked on her tits, biting her nipples until she yelped. She reached between us, unzipped me, and pulled my cock out. Her hand was hot and tight as she stroked me. "God, it's so thick," she said, spitting on it and jerking faster.
I shoved her shorts aside and found her pussy already soaked. Two fingers slid right in. She was tight and dripping, clenching around me while she rode my hand. "Fuck me," she begged. "Right here on the couch."
I flipped her onto her back, ripped her shorts off, and spread her legs wide. Her cunt was shaved smooth and shiny with juice. I buried my face in it, licking her clit and tongue-fucking her hole until she came, thighs squeezing my head and her juices all over my chin. Then I climbed up and slammed my cock balls-deep into her.
She screamed and clawed my back. "Yes, fuck me hard! Use that sister pussy!" I pounded her, the couch creaking, her tits bouncing with every thrust. Sweat poured off us. I flipped her over, yanked her ass up, and drove back in from behind, slapping her cheeks red while I fucked her deep.
We didn't stop there. She sucked me clean, gagging on her own taste, then rode me reverse so I could watch my cock disappear into her stretched hole. I came inside her the first time, pumping thick loads while she milked me. We kept going all nighton the floor, in the shower, her bent over the kitchen table with my cum leaking down her thighs.
By morning we were raw and sore but still hungry. Emma looked at me with that same dirty smile. "Parents get back tomorrow. We better make the most of tonight."
We did. Raw, loud, no holding back. Just brother and sister fucking like animals until the sun came up again.
