The bi sub, trembling with anticipation, feels the cold, hard strap-on press against his virgin asshole. His femdom mistress, in full control, commands him to relax and push back. She grips his hips and slowly, firmly, pushes her cock inside him. He gasps at the intense, unfamiliar sensation as she begins to fuck him, her pace increasing with his moans, until she's pounding him mercilessly, their bodies slapping together in a symphony of humiliation and pleasure.