A sneaky cousin seizes the moment, slipping into the room with an inflatable ball, ready to fill more than just the void in his life. He positions it at his cousin's entrance, his heart pounding as he begins to pump, the ball stretching her tight hole wider with each push. She squirms, moaning softly, the unexpected pressure sending waves of pleasure through her. He watches, entranced, as her ass swallows the ball whole, leaving only the nozzle visible.