Muscles straining, the PAWG with a backside built for sin grips the treadmill rails and starts pounding her ass back onto the belt. Thighs burn, ass cheeks jiggle with each thrust, and the machine groans under her weight. Her sports bra rides up, tits swaying free as she rides out the burn. Heavy breathing mixes with the treadmill’s whir, her body slick with sweat. When the belt speeds up, she digs her toes in and takes it harder, ass slapping against the machine until she can’t hold back anymore.
