Mistress Rosella did not feel like punishing her slave since she was exhausted. But she did not want to let him go easy because he was getting used to it. So she decided to punish him or rather degrade him and make him know she meant business. She used her pee to punish him, something she had never done before. She forced him to drink her pee and by the time he was done drinking it, he had learned his lesson.