Madame Marissa trains mistresses on how to humiliate and punish slaves and she does it for a fee. She had another client today and she wanted to show her how to punish a slave using sneakers. She wore hers and asked her to wear hers. She then showed the mistress how to trample the slave and make him feel as much pain as she wanted the slave to feel. It was fun for the mistresses but not for the slave.