Madame Ellen needed to dominate this loser and she did so using her spit. She had to make sure that the guy did all she asked him to do and that he never messed with her again after that. So she did what she does best and she used her ballbusting fetish to dominate him. He cried and wished he had never messed with her again and it worked as well as she wanted.
Madame Ellen wanted her slave to stop being argumentative and she knew that the best way to do so was to shock him. That is why the mistress rushed to ensure that he learned his lesson the hard way by choking him. The mistress used a footmuff to do it and he never repeated his mistake after that since he knew what the mistress was capable of doing to him.
When this mistress found out that her son was missing class and she had paid a lot of money for his education, she had to punish him. She did this by making him eat her trash and she sat down to watch him do it. The mistress told him that if he did not finish it all, she would crush his balls. He feared she would do that and he ate all the trash.