In a steamy bisexual fantasy, a bi-curious sub is initiated into the world of pegging by a stern, experienced trainer. Bent over and vulnerable, they're introduced to the trainer's huge strap-on, the sight of it making them question their limits. The trainer, a dominant mistress, commands the sub to open up, their tight ass clenching and unclenching as they try to relax. She lubes up the massive strap-on, pushing the head against the sub's virgin hole, making them gasp and moan as they're slowly, deliciously filled.