Mistress, clad in latex and heels, takes control in her dungeon, her slave bound and eager. She activates a powerful machine, its thick, veined dildo glistening with lube. She teases his ass, running the toy along his crack, before pushing it inside. The machine's steady, relentless thrusts have him groaning, his cock hard and leaking. She watches, smirking, as he's used, his body betraying his pleasure despite his protests. She increases the speed, pushing him closer to the edge, before finally letting him come undone.