The serf's body is a canvas, a masterpiece of pain and pleasure. His mistress paints with a whip, her strokes precise, her aim unerring. She brings him to the edge of endurance, his cries echoing off the stone walls, his body glistening with sweat and blood. She orders him to his knees, her hand fisting his hair, and he opens his mouth, ready to receive her. She comes with a shudder, her hot cum filling his mouth, dripping down his chin. He swallows, his eyes locked onto hers, his body trembling with the effort of holding back his own release. His mistress smiles, her hand caressing his cheek, "Good boy," she purrs, before walking away, leaving him bound and aching, his cock throbbing with unspent desire.