I never expected a random username in a dimly lit chatroom to pull me under like that. It was past 2 a.m., the house silent except for the hum of my laptop fan, when I typed my first message into the incest sex stories chatroom. The place was raw and unfiltered—threads full of people swapping the filthiest family fantasies, all of us pretending we were just here for the words. My handle was “CuriousSister87,” and within minutes someone named “BigBrother88” slid into my DMs.
“Hey. You really into brother-sister stuff or just browsing?” His first line was blunt, no warm-up. I stared at the screen, heart kicking harder. I typed back that I’d grown up sharing a bathroom with my older brother, that the sight of him stepping out of the shower still lived in my head years later. He replied with a single sentence that made my thighs press together: “Tell me what you wanted him to do to you.”
The words poured out of me. I confessed how I used to stand at the cracked door, watching water slide down his back, imagining him turning around and catching me. How I pictured him pushing me against the sink, yanking my nightshirt up, and sliding into me while our parents slept down the hall. BigBrother88 didn’t judge.
He just typed back in short, filthy bursts: “I’d bend you over that counter. Spread you open. Fuck you slow so you had to bite your own arm to stay quiet.”
We kept going. He described gripping my hips, the wet slap of skin, the way my tits would bounce in the mirror while he pounded me. I described reaching between my legs right there at my desk, two fingers circling my clit while I typed one-handed. Every time I sent a new detail he answered with something dirtier—how he’d lick my asshole after he came inside me, how he’d make me taste myself on his cock. The chatroom kept scrolling with other people’s stories, but ours felt private, a hot little bubble.
I told him about the summer I was eighteen, how my brother and I had been left alone for a weekend. We’d watched a movie on the couch and his hand had ended up on my bare thigh. Nothing happened then, but the ache never left. BigBrother88 wrote, “You should have climbed into his lap. Rubbed your pussy on his cock through his shorts until he snapped.” The image hit so hard I came right there, thighs shaking, breath catching as I typed “fuck yes” with trembling fingers.
He didn’t stop. He pushed for more. “What would you do if he walked in right now?” I glanced at my bedroom door even though I lived alone. My answer was honest: I’d drop to my knees, pull his cock out, and suck him while telling him every filthy thing I’d fantasized about. BigBrother88 sent a long paragraph describing exactly how he’d hold my head, how he’d fuck my throat, how he’d pull out and paint my tits before bending me over the bed and taking my ass for the first time.
We kept the conversation going until the sky outside turned gray. By then my panties were soaked through, my fingers sticky, and I’d come twice more reading his words. He asked if I wanted to meet in real life. I said no at first, then yes, then no again. The danger of it made me wetter than anything else. We traded numbers. The next night we switched to voice chat, his low growl describing how he’d pin me down and breed me while I moaned into my pillow so the neighbors wouldn’t hear.
Eventually we stopped pretending it was only fantasy. The first time we actually met, he showed up at my door looking nothing like my brother but carrying the same confident stance. The second the lock clicked he had me against the wall, hand up my skirt, fingers pushing inside me while he whispered every line we’d typed in the chatroom. He fucked me on the kitchen counter exactly the way we’d described, then on the floor, then in my bed with my legs over his shoulders. Each thrust felt like it was answering every message we’d ever sent.
Afterward we lay there sweaty and spent, and he pulled out his phone. We opened the chatroom again together, reading our old thread while his cum leaked out of me. He typed a new message right in front of me: “Just finished living out every word with my new little sister. Who’s next?” I watched the replies flood in, my body already warming up again.
We never stopped going back to that chatroom. Sometimes we posted together, sometimes we just lurked and got each other off while reading other people’s stories. The fantasy stayed alive because we kept feeding it—new details, new positions, new ways to say the forbidden things out loud. Every time I logged in now, I remembered the night it all started with one simple question in the incest sex stories chatroom, and how that single line had turned into nights of raw, messy, perfect reality.
