The dimly lit gym, empty save for the soft hum of machinery, provides the perfect cover for Alex and Lisa's illicit tryst. Lisa, her heart pounding from her workout, feels Alex's rough hands grip her hips as he slides into her from behind. Her small tits press against the handlebars as he pounds her, their sweat mingling. She gasps, her pussy clenching around his cock as she comes, before he pulls out, his hot cum dripping from her gaping asshole onto the gym floor.