I logged into the chat room at midnight, cock already hard from the username alone: "ForbiddenSis4U". The room was full of pervs swapping the usual shit, but her messages cut straight through. "Big brother, I've been touching myself thinking about you all day. Want to hear how wet my pussy is?"
I typed back fast: "Tell me everything, little sis. Describe that tight cunt for your big brother."
She didn't hesitate. "It's dripping. I shaved it smooth just like you told me last night. Two fingers inside right now, pretending they're yours."
We went at it for hours. Raw, filthy back-and-forth that left my dick leaking onto my keyboard. She called me "bro" every other sentence, begging me to fuck her like the dirty sister she was. I told her I'd pin her down, spread her legs, and pound her until she screamed my name. She came twice just from the words, sending me voice notes of her moaning and whimpering.
By the third night the chat turned real. She admitted she was 23, living two states away, and her name was Emily. I was 26, single, and the taboo shit was hitting harder than any porn. We swapped pics. Her body was perfect—perky tits, round ass, that smooth pussy she'd described. Mine was thick and veiny, exactly what she wanted to suck.
"Meet me," she typed one night. "Hotel halfway. No names, just us. Brother and sister for real."
I drove. My balls ached the whole way. When I knocked on the door she opened it in nothing but a tiny tank top and panties. No hellos. I grabbed her, slammed the door, and shoved my tongue down her throat while my hands ripped those panties off.
"Fuck, sis, you're soaked already," I growled against her mouth.
She dropped to her knees. "Been waiting for big brother's cock." Her lips stretched around me, sucking sloppy and deep. Spit ran down my shaft as she gagged herself, eyes watering while she looked up. I fucked her face hard, holding her hair, telling her what a nasty little sister she was for wanting this. She moaned around my dick, fingers rubbing her clit the whole time.
I pulled out before I came and bent her over the bed. Her ass was up, pussy glistening. I slammed in balls-deep on the first thrust. She screamed into the mattress. "Yes, brother, fuck me! Stretch my cunt!"
I pounded her like I owned her. Skin slapping, her juices coating my cock and dripping down her thighs. Every time I called her "sis" she clenched tighter. I reached under and pinched her nipples, then rubbed her swollen clit until she came hard, shaking and squirting around me.
We didn't stop. I flipped her, spread her legs wide, and drove back in. Missionary so I could watch her face while I bred her. "Gonna fill my little sister up," I grunted. She wrapped her legs around me, heels digging into my ass. "Do it, brother. Cum inside me."
I exploded deep, pumping thick ropes into her. She came again just from the feeling, milking every drop.
We spent the whole weekend raw and nasty. Shower sex where I fucked her against the wall, water running over us while she begged for more. 69 on the floor, her riding my face while she deepthroated me. I took her ass too, slow at first then rough, her fingers in her pussy the whole time. Every position, every filthy word.
"Fuck your sister." "Cum for your brother."
By checkout we were sore, covered in each other's cum, and already planning the next meet. The chat room was still there, but now we had the real thing. No going back.
We still message every night. She sends videos of her playing with my cum leaking out of her. I send voice notes telling her exactly how I'm going to use her next time. The taboo never gets old. It's hotter because it's us—brother and sister who found each other in the dirtiest way possible and decided to keep going.
