Bound and vulnerable, the uninhibited teen squirms in her restraints, her ass prominently displayed for the BDSM therapist. He starts by spreading her ass cheeks, revealing her tiny, puckered hole. With a hungry growl, he dives in, his tongue lapping at her asshole, sending shivers down her spine. He then replaces his tongue with his cock, slowly pushing into her ass. She cries out, her voice muffled by the gag, as he begins to fuck her hard, his cock disappearing completely inside her. The nuthouse fills with the sound of their flesh slapping together, punctuated by her desperate moans, as he gives her the unusual, nailing treatment she's been craving.