The submissive, bound and at his Mistress' mercy, strokes his cock until it throbs with impending release. She leans in, her breath hot on his ear, commanding, 'Cum, and swallow every drop.' He hesitates, but her stern gaze and the sharp smack of her riding crop on his ass spur him on. As he reaches climax, he catches his load in his mouth, eyes watering as he fights the urge to gag. His Mistress purrs with satisfaction, 'Good boy. Now, show me.'