Stepbrother's Massive Cock Claims My Tight Ass

Alex had always been the quiet one, the slim 19-year-old college freshman who preferred burying his nose in textbooks or scrolling through his phone in the shadows of their cramped two-bedroom apartment. Sharing the space with his new stepbrother Brandon—21, a towering muscular jock with broad shoulders, chiseled abs, and thighs like tree trunks—had turned his life into a delicious torture since their parents' whirlwind remarriage six months ago. The apartment was tiny, a shoebox on the edge of campus with thin walls and barely enough room to swing a cat, forcing them into constant proximity. Alex's days blurred into stolen glimpses: Brandon lounging shirtless on the worn leather couch after workouts, sweat glistening on his tanned skin, or padding around in those obscenely tight gym shorts that hugged every curve of his powerful legs and left nothing to the imagination.

It was the bulge that haunted Alex's dreams. Massive, obscene, straining against the fabric like it was begging to be freed. Alex, shy and inexperienced, had only ever fantasized about cocks like that in the privacy of his room, jerking off furiously to porn of dominant tops claiming eager bottoms. But Brandon? He was real, right there, oblivious—or was he?—to the way Alex's cheeks flushed whenever he caught sight of that monstrous outline swinging heavily between his stepbrother's legs. Alex would avert his eyes, heart pounding, pretending to focus on his laptop, but the ache in his own slim body betrayed him. He craved it. Craved Brandon's massive cock splitting him open, claiming him in ways he'd never dared voice.

Brandon, for his part, thrived on the tension. The jock life suited him—football practice, gym sessions, parties—but coming home to Alex's wide-eyed stares ignited something primal. He knew the kid was checking him out; those lingering looks when he stretched shirtless in the living room, or when he "accidentally" adjusted himself in those shorts. Brandon's cock was a beast—ten thick inches when hard, veiny and girthy—and he loved the power it held over shy boys like Alex. Stepbrothers or not, the air crackled with unspoken want.

One humid Friday night, the tension boiled over. Their parents were out of town on some romantic getaway, leaving the apartment to the two of them. Alex suggested gaming to kill time—anything to distract from the heat pooling in his gut. They sprawled on the couch in the dimly lit living room, controllers in hand, the glow of the TV casting flickering shadows. Brandon, predictably shirtless in his gray gym shorts, manspread wide, his bulge already prominent even soft. Alex sat cross-legged beside him, trying to focus on the screen, but his eyes kept darting down.

"Dude, you suck at this level," Brandon teased, his deep voice rumbling as he leaned back, one arm draped over the couch. His free hand casually scratched at his abs, drawing Alex's gaze lower. The shorts rode up, the outline of his heavy balls visible, and Alex felt his mouth go dry.

"S-sorry," Alex stammered, cheeks burning. He shifted, his own cock twitching in his loose sweats.