Mistress, a stern domme, takes her bisexual slave through an intense ass-training session. Starting with a small, she works the submissive's tight hole, stretching it wider with each insertion. The mistress, clad in leather and heels, commands her slave to take bigger and bigger toys, pushing his limits. The bi slave, eager to please, takes it all, moaning and writhing in pleasure and pain, as his ass is transformed into a gaping, toy-filled hole.