I still remember the night it started like it was yesterday, even though five years have passed. I was twenty-two, fresh out of college and crashing at my older brother’s apartment while I hunted for my first real job. Mark was twenty-five, already settled into his own place with a spare room he offered without hesitation. We had always been close growing up, but something shifted the moment I moved in. The air between us grew thick whenever we brushed past each other in the narrow hallway or shared the couch late at night watching old movies.
It began with small things. His hand lingering on my lower back when he reached around me for a glass. The way his eyes followed the curve of my legs when I walked around in shorts. I told myself it was harmless, just the comfort of family. Then one humid summer evening the power went out and we lit candles in the living room. We sat on the floor drinking warm beer and talking about everything we had never said as kids. The conversation turned to old crushes, then to what it felt like to be lonely even when people were around. Mark’s voice dropped when he admitted he had always thought I was beautiful in a way that made him feel guilty.
I should have laughed it off. Instead I leaned in and kissed him. It was soft at first, testing, but the second his tongue touched mine something broke open. Years of pretending fell away. His hands slid under my tank top, palms rough from work, cupping my breasts like he had been waiting his whole life. I moaned into his mouth and that sound seemed to snap whatever restraint he had left.
We moved to his bedroom without speaking. Clothes came off in a rush. I remember the way his cock looked in the candlelight, thick and already leaking when I wrapped my fingers around it. He pushed me onto the bed and spread my legs, burying his face between them without warning. His tongue was relentless, licking long stripes up my slit before focusing on my clit. I came hard the first time, thighs shaking against his shoulders, but he didn’t stop. He slid two fingers inside me, curling them until I was gasping his name and grinding against his mouth again.
When he finally climbed over me I was soaked and desperate. He didn’t ask if it was okay; the look in my eyes told him everything. He pushed inside slowly at first, stretching me, letting me feel every inch. Once he was buried to the hilt he paused, forehead pressed to mine, both of us breathing like we had run miles. Then he started moving. Hard, deep thrusts that made the headboard knock against the wall. I wrapped my legs around his waist and begged him not to stop, told him how good his cock felt, how long I had wanted this too. The words came out filthy and honest. He fucked me like he was trying to claim every part of me, one hand gripping my hip, the other tangled in my hair.
We didn’t last long that first time. He pulled out at the last second and came across my stomach, hot streaks that I rubbed into my skin while he watched, still hard. Round two happened in the shower an hour later, slower, steam filling the room while he took me from behind, one hand between my legs rubbing my clit until I came again with my forehead against the tiles.
After that night we couldn’t stop.
Every day brought new risks and new positions. I would wake up to his mouth on my nipples or his fingers already inside me. We fucked on the kitchen counter while dinner burned, in the laundry room with the machine vibrating beneath us, once even in the stairwell of the building when we couldn’t wait to get upstairs. He loved when I talked dirty, loved hearing his little sister beg for his cum. I loved the way he looked at me afterward, tender and possessive at the same time.
We never told anyone. We kept it secret, careful around family, but behind closed doors we explored everything. He taught me how to ride him until my thighs burned. I learned exactly how tight to grip his balls when I sucked him off. Some nights we went slow, bodies pressed together, kissing for hours before he slid into me. Other nights he bent me over the arm of the couch and took me rough until I was sobbing with pleasure.
Five years later we still live together, still pretend to the world that we are just siblings sharing rent. But every time he walks through the door and locks it behind him I feel that same rush. He is still my brother. He is still the only man who knows exactly how to make me fall apart. And every time he pulls me close and whispers how much he needs his sister’s tight pussy, I know we will never stop crossing that line. It is ours now, secret and burning and ours alone.
