Mistress Zephy does not tolerate disrespect from anyone and when this guy did it, he had to endure her punishment. She made sure that he felt all the pain in the world and that is why she used her shit fetish to deal with him and to teach him never to repeat that. He got the message in the crudest way possible and he learned from it. He never repeated it.
Mistress Zephy felt that the best way to deal with this loser was to use her scat femdom. That is exactly what she used to dominate as well as to degrade this guy. He never saw it coming and he wished that he had never pissed her off but it was too late. She had to make him eat her poo as well as to drink her pee and he did it all.
When this mistress was fired, she had nothing to lose by retaliating against her boss who had fired her. She did not care about what he felt or what he would do as she did not work for him anymore. So the mistress turned him into a human toilet and she fed him poo. He cried and begged her to stop but she ignored him and continued dominating and humiliating him.
Mistress Zephy felt that the best way for her to deal with this guy was to make him eat her shit and drink her urine. That is why she went out of her way to deal with the guy like never before. And shit and urine were the best punishment as they made him not only change, but also fear her and they never had an issue again after that.