Cherie Deville, the step-sister, finds her brother in the home gym, working up a sweat. She joins him, their bodies brushing as they lift weights. The sexual tension builds, and Cherie can't help but notice her stepbrother's growing bulge. She starts touching herself, her breath heavy, and her brother, unable to resist, pushes her against the treadmill, lifting her tiny gym shorts to reveal her shaved pussy. He fingers her, making her moan, before plunging his thick cock into her, fucking her hard as she clings to him, their bodies glistening with sweat.