The trainer's massive cock tents his shorts, betraying his arousal despite his stern demeanor. The teen, a sultry brunette, notices, her eyes widening. She bites her lip, her pussy throbbing at the sight of his bulge. He spanks her harder, his breathing ragged, his control slipping. She moans, the pain morphing into pleasure. He pauses, his hand hovering over her reddened ass, his voice hoarse, "You're enjoying this, aren't you?" She nods, her voice barely a whisper, "Yes, sir. Please, more."