In a dimly lit, kinky dungeon, a shackled slave, eyes downcast, awaits her Mistress' command. The Mistress, a dominant lesbian with a penchant for fetish play, secures a marital device around her slave's waist. The device's thick, ribbed dildo presses against the slave's pussy, ready to invade. The Mistress, clad in a corset and stockings, orders her slave to move, to fuck herself on the device. The slave, hesitant at first, begins to move, feeling the device fill her, stretch her. The Mistress watches, her own arousal evident, as her slave's pace increases, the sound of wet, slapping flesh filling the room.