In the final installment of this intense role-play, Diana's bondage tightens as Frank Gun, her malevolent educator, uses her body for his pleasure. He commands her to arch her back, pushing her ass out, and applies a thick, buzzing vibrator to her tight, unyielding asshole. She grits her teeth, her body convulsing as he works the toy in and out, her juices dripping down her thighs. Her eyes water, and her cries fill the classroom, but Frank shows no mercy, preparing her for the main event - his own throbbing cock.