In a dimly lit dungeon, a submissive kneels before her master, eager to please. Her eyes water as she takes his massive cock deep into her throat, gagging and choking on its length. The master, pleased with her service, commands her to the machine. She's bound, hands behind her back, and the machine's cock replaces his. It thrusts into her, rough and unforgiving, as she screams around the gag in her mouth. The master watches, his hand on her throat, guiding her, until she's a quivering, spent mess, collar damp with her saliva.