I never planned to fuck my sister during that Christmas trip, but once we were alone in the cabin the air changed and everything we had buried for years came rushing out raw and filthy.
The snow had piled up outside, trapping us for three extra days after the rest of the family left early. Emma and I were the only ones left, twenty-three and twenty-five, both of us pretending the old tension wasn’t there. We drank the last of the whiskey and sat in front of the fireplace, the orange light sliding over her bare legs under that thin robe she kept “forgetting” to tie properly.
She stretched and the robe fell open. Her tits were full and soft, nipples already tight from the chill. I stared. She didn’t cover up. Instead she smiled slow and dirty.
“You’ve been looking at me like that since we were teenagers,” she said, voice low. “Might as well do something about it now that nobody’s around to catch us.”
I moved before I could talk myself out of it. My mouth was on hers, hard and hungry. She tasted like whiskey and cinnamon. Her tongue pushed back just as rough. My hands went straight to her tits, squeezing, thumbs dragging over those stiff nipples until she moaned into my mouth.
Emma shoved my shirt off and went for my belt. She freed my cock and wrapped her fingers around it, stroking slow and tight. “Fuck, you’re already leaking for me,” she whispered. She dropped to her knees on the rug and took me straight into her mouth, no teasing. Hot, wet suction, her tongue working the underside while she looked up at me with those dark eyes. I grabbed her hair and fucked her throat, watching spit drip down her chin onto her tits.
She pulled off with a wet pop. “I want you to eat my pussy first. Then I want you to fuck me like you’ve always wanted to.”
I laid her back on the couch, spread her legs, and buried my face between them. She was shaved smooth and already soaked. I licked her in long, filthy strokes, sucking her clit, pushing two fingers inside her tight cunt. She tasted sweet and salty. Her hips rolled against my mouth while she moaned my name, telling me how wrong it was and how good it felt. When she came she grabbed my hair and ground against my tongue, thighs shaking.

I didn’t give her time to catch her breath. I flipped her onto her stomach, pulled her hips up, and sank my cock into her in one deep thrust. She was so fucking tight and hot. We both groaned loud. I fucked her hard, skin slapping, the fire crackling beside us. Every stroke made her cunt grip me tighter.
“Harder,” she begged. “Fuck your sister like you mean it.”
I slammed into her, one hand reaching around to rub her clit while the other held her hip. She came again, pulsing around my cock, moaning into the cushion. I pulled out, flipped her over, and pushed back in, wanting to watch her face while I filled her. Her legs wrapped around me. We moved together, sweaty and desperate, the holiday lights still blinking on the tree behind us.
I came deep inside her, grinding in as far as I could go, pumping every drop while she kissed me and whispered how she’d wanted this for years. We stayed locked together, breathing hard, the forbidden heat still burning between us.
Later we fucked again in the shower, then once more on the kitchen table with her bent over the leftover pie. By the time the snowplow finally came, we had already decided this wouldn’t be the last holiday we spent alone together.