The air in the dungeons hung thick with the scent of damp stone and simmering potions, a perfect trap for the man Severus Snape had been waiting for. Sirius Black arrived like a storm, all leather jacket and reckless defiance, slamming the door behind him. "You summoned me, Snivellus? Make it quick."
Snape didn't waste words. He stepped forward, wand raised, and bound Sirius's wrists with a silent spell before the other man could react. "On your knees, Black. You've run your mouth long enough." The power shift was immediate and electric. Sirius's gray eyes flashed with anger and something darker, but he dropped, the resistance in his body only heightening the tension.
Snape circled him slowly, fingers trailing over Sirius's shoulders before yanking his head back by the hair. "You want this. The mutt needs a master." He freed his cock, thick and already hard, and pressed it against Sirius's lips. "Open." Sirius resisted for a moment, teeth grazing, but Snape's grip tightened until he submitted, mouth stretching wide around the invasion. Snape thrust deep, fucking his throat with controlled force, watching tears form at the corners of those defiant eyes.
"Take it all," Snape growled, hips snapping forward. Saliva dripped down Sirius's chin as he gagged and swallowed, the wet sounds echoing off the walls. Snape pulled out only to drag Sirius upright and bend him over the worktable, yanking down his trousers to expose pale skin. He spat into his hand, slicking two fingers before pushing them inside without mercy. Sirius grunted, pushing back despite himself, hole clenching around the intrusion.
Snape worked him open roughly, scissoring and twisting until Sirius was panting and leaking. Then he replaced fingers with his cock, driving in to the hilt in one brutal thrust. The stretch burned, and Sirius cursed, but his body betrayed him, rocking back to meet every punishing stroke. Snape gripped his hips hard enough to bruise, pounding into him with dark intensity. "You're mine like this. No more running."
Sweat slicked their skin as Snape leaned over him, biting at the back of his neck while reaching around to stroke Sirius's cock in time with his thrusts. The rhythm built, raw and relentless, until Sirius came with a hoarse shout, spilling over Snape's fist. Snape followed seconds later, burying himself deep and flooding him with hot release, the power exchange complete in that shuddering moment.
They stayed locked together, breathing ragged, until Snape finally withdrew and released the bonds. Sirius straightened slowly, a smirk tugging at his swollen lips despite the ache. "Next time, potions master, I pick the room." The rivalry lingered, but the hunger had found its outlet, leaving both men marked and wanting more.
