We had always been close, but that night the line snapped. I was twenty-four, she was twenty-two, both of us home for the weekend after too many months apart. The house was empty. Mom and Dad were gone until Monday. We drank cheap whiskey on the couch and talked shit the way we always did, except her shorts kept riding up and her tank top was thin enough that I could see the dark circles of her nipples.
She caught me staring and didn’t look away. “What?” she said, voice low.
“You know what.”
She set her glass down, climbed into my lap, and ground down on my cock through my jeans. “Then do something about it, big brother.”
I grabbed her ass with both hands and squeezed hard. “You sure you want this? Once we start, I’m not stopping.”
She answered by yanking her tank top off. Her tits were small and perfect, nipples already tight. I sucked one into my mouth and bit down until she gasped. My hand slid under her shorts and found her bare and soaked. Two fingers shoved straight into her cunt while my thumb worked her clit.
“Fuck, yes,” she hissed. “Finger your little sister’s pussy.”
I flipped her onto her back on the couch and ripped the shorts off. She spread her legs wide, cunt glistening. I buried my face between her thighs and licked her like I was starving. She tasted sweet and dirty at the same time. I tongue-fucked her hole, then sucked her clit until her thighs shook around my head. She came loud, grinding on my face, calling me “brother” the whole time.
I stood up, stripped, and let my cock slap against my stomach. She stared at it, licked her lips, then got on her knees. Her mouth was hot and greedy. She took me deep on the first try, gagging but not stopping. Spit ran down my balls while she bobbed fast, one hand pumping the base.
“Choke on it,” I told her. She moaned around my cock and took me deeper.
When I was close I pulled her off and bent her over the arm of the couch. I slammed into her in one thrust. She was tight and wet and perfect. I fucked her hard, skin slapping, her tits swinging. Every time I bottomed out she pushed back, begging for more.
“Harder, brother. Wreck my cunt.”
I reached around and rubbed her clit while I pounded her. She came again, cunt pulsing around my cock. I didn’t stop. I pulled out, flipped her onto her back, and shoved back in. Her legs wrapped around my waist. I fucked her deep and steady, watching her face twist with every thrust.
She reached down and spread her pussy lips so I could see my cock disappearing inside her. “Look how deep you are. Your little sister’s taking every inch.”
I lost it. I hammered into her until the couch creaked, then pulled out and painted her stomach and tits with thick ropes of cum. She rubbed it into her skin, then licked her fingers clean while staring at me.
We weren’t done.
I carried her to her old bedroom. She pushed me onto the bed and climbed on top, sinking down on my cock again. She rode me slow at first, rolling her hips, then faster, tits bouncing. I slapped her ass and told her what a filthy little sister she was. She came again with my name on her lips.
Later I took her from behind on the bedroom floor, her cheek pressed to the carpet while I used her. She reached back and spread her ass for me, and I spit on her hole before pushing a thumb in. She came so hard her legs gave out.
By morning we’d fucked in the shower, against the kitchen counter, and once more on the living room floor.
Cum leaked down her thighs and she smiled like she’d won something.
We never talked about stopping. We just kept going whenever we wanted. She was my little sister, and her cunt belonged to me now.
