The gym's empty, but the air's thick with desire. A husband, wife, and their friend, all shirtless and glistening, can't keep their hands off each other. The wife, her sports bra barely containing her bouncing breasts, grinds on her husband's lap, his friend watching eagerly. He joins in, sandwiching her between their hard bodies, hands roaming, exploring. They move to a bench, the wife straddling one, her husband's cock deep in her mouth, as the friend fucks her from behind, their moans echoing in the empty gym.