I was nineteen when it started, home from college for the summer, and my sister Emma had just turned eighteen. We had always been close, sharing secrets in the dark of our childhood bedrooms, but that summer the house felt different with our parents gone on a long trip. One humid night after too many drinks on the back porch, we ended up in her room talking about everything and nothing. The conversation drifted to fantasies, and before I knew it she was asking if the wild stories online about brothers and sisters were real. I told her I didn't know, but the way her eyes locked on mine said she wanted to find out.
Emma leaned in first. Her lips brushed mine, soft at first, then hungry. I tasted the vodka on her tongue and felt my cock harden instantly. She climbed into my lap, grinding against me through our thin shorts. "Show me," she whispered. I slid my hands under her tank top, cupping her full tits, thumbs circling her stiff nipples until she moaned. She reached down, freed my dick, and wrapped her fingers around it, stroking slow and firm.
We didn't rush. She stood, peeled off her clothes, and stood naked in the low light. I did the same. Her body was smooth, shaved smooth between her legs, and when she spread them on the bed I buried my face there. Her pussy tasted sweet and hot. I licked her clit in steady circles, slid two fingers inside her tight cunt, and pumped them while she bucked against my mouth. She came hard, thighs clamping my head, gasping my name.
Then she pulled me up and guided my cock to her entrance. "Fuck me," she said, raw and direct. I pushed in deep, feeling her walls grip me. We fucked hard and fast at first, skin slapping, her legs locked around my waist. I flipped her onto all fours and drove into her from behind, watching her ass ripple with every thrust. She reached back to rub her clit and came again, soaking my balls.
We kept going. I pulled out and she sucked me clean, taking me to the back of her throat, gagging and drooling.
I came down her throat, then later inside her after she begged for it. Round after round that night, we tried every position we could think of, whispering filthy things about how wrong and good it felt. By morning we were sore, sticky, and already planning the next night.
It became our secret. Every chance we got, we fucked like animals, sometimes slow and deep, sometimes rough and quick in the laundry room or the car. The stories online were true for us. We never stopped.
