In the dimly lit gym, the teen's eyes lock onto her instructor, his bulging muscles and growing bulge in his shorts. She licks her lips, her heart pounding. He approaches, his hands firmly on her waist, guiding her to a secluded corner. She eagerly drops to her knees, pulling out his throbbing cock, her full lips wrapping around it. He groans, his hands fisting her hair as she sucks him deep. He then bends her over, his thick cock stretching her tight pussy, her moans echoing through the gym as he pounds her relentlessly.