Gagged and tied up, a helpless serf is left at the mercy of his dominant mistress. She teases him mercilessly with a vibrator, rubbing it against his throbbing cock through his pants, denying him release. His moans are muffled as she takes out her frustration on him, slapping his face and fondling his balls. She finally frees his cock, taking it deep into her mouth, sucking him expertly while he's bound and helpless.