With a firm hand, the mistress grasps her submissive's cock, stroking it to full hardness before slipping a chastity cage over it. She takes her time, relishing his discomfort, his futile attempts to thrust into her hand. She cinches the cage tight, trapping his erection, then seals it with a small lock. "There," she whispers, holding the key up to his face, "you're mine now." She leans in, her voice dropping to a sultry growl, "And I can do whatever I want with this useless cock."