Marcus was the kind of bully who didnt need to raise his voice. At six-foot-five with shoulders that filled doorways and a thick black cock that swung heavy between his legs in the showers, he owned the gym like it was his personal hunting ground. Id been on the receiving end of his shit for monthsshoves in the hallway, my gym bag dumped out, the usual. But it all changed the night he caught me watching him fuck my girl.
Id brought Lena to the late-night workout because she liked the quiet. She was twenty-two, tight little body, always in those tiny shorts that rode up her ass. Marcus noticed. He always noticed. That night he cornered us near the lockers, still dripping from his shower, towel slung low. Your boy here owes me respect, he told Lena, voice low and rough. You gonna make him watch while I collect?
Lenas eyes dropped straight to the bulge under his towel. She didnt say no. Marcus grinned, yanked the towel off, and let that fat black dick hang outlong, veined, already starting to swell. He grabbed Lena by the hair, not hard enough to hurt, just enough to show he was in charge, and pulled her to her knees on the cold tile.
Open up, pretty girl. Show your man how a real dick tastes.
She did. Lenas lips stretched wide around the head, spit already dripping down her chin as she tried to take him deeper. Marcus didnt thrust at first; he just held her there, letting her struggle and gag while he looked straight at me. This is what happens when you act like a bitch. Your girl gets the real thing.
He started fucking her mouth slow and deep, one big hand on the back of her head, the other reaching down to squeeze her tits through her sports bra. Lena moaned around his cock, eyes watering, but she didnt pull away. When he finally pulled out, strings of spit connected her lips to that shiny black shaft, he hauled her up, spun her around, and bent her over the bench.
Marcus ripped her shorts and panties down in one move. Her pussy was already glistening. He rubbed the fat head of his cock up and down her slit, teasing, then pushed in. Lena gasped loud as he stretched her open, inch after thick inch disappearing into her. Fuck, shes tight, he growled, looking at me again. You ever feel her this wet for you? Didnt think so.
He started pounding. The sound of skin slapping skin echoed off the lockerswet, filthy, relentless. Lenas moans turned into broken cries every time he bottomed out. Marcus reached around and rubbed her clit with two thick fingers, making her shake. Tell him whose pussy this is now, he ordered.
Yours, she gasped. Its yours, Marcus. Fuck, dont stop.
He didnt. He fucked her through one orgasm, then another, her legs trembling, juices running down her thighs. When he was close he pulled out, spun her back around, and painted her face and tits with thick ropes of cum. Some landed in her open mouth; she swallowed without being told.
Marcus looked at me one last time. Next time you see me, you thank me for taking care of her. Got it?
I nodded, dick hard in my own shorts, humiliated and throbbing.
After that night it became regular. Sometimes in the locker room, sometimes at our apartment when he decided to drop by. Hed text Lena, show up, and fuck her wherever he wantedon our couch, against the kitchen counter, once on our bed while I sat in the corner and watched. He never let me join.

He just made sure I saw everything: how deep he could go, how loud she got when he pounded her ass, how she begged for his load.
The last time he came over he had her ride him reverse cowgirl so I could watch her stretched pussy sliding up and down that black cock. Look at that, he said, gripping her hips. Shes creaming all over me. You ever make her do that?
Lena came hard, shaking, and Marcus followed, pumping her full. When he pulled out, thick cum leaked out of her and onto our sheets. He stood, wiped his dick on her thigh, and left without another word.
Lena looked at me, flushed and satisfied, and smiled. Youre not mad, are you?
I wasnt. I was rock hard and already wondering when hed be back. Marcus had turned us both into exactly what he wantedhis personal fuck toysand neither of us was going to stop him.