This guy was a one minute guy and there was no way this mistress was going to look away and let it slide. That is why she chose to use her hot ass to dominate as well as to humiliate. That is why she made sure that she had him eat her poo for him to learn that he had to not only last longer, but he had to make her orgasm.
This guy was crazy and this mistress did not want to condone any of the nonsense he did. She had to punish him and she used her shit femdom to teach him a lesson that no one had ever taught him. The mistress was out to make sure that the guy would never mess with her and that is why she did what she had to do and she shit on him.
This mistress had a problem with ineffective people and she had to ensure that they did not go anywhere near her. That is why she dominated this guy and she controlled him with her shit. He had to lick her ass and he had to eat her poo before she was done with him. She laughed at him as she did her thing on him and enjoyed herself at his expense.
Mistress Nemezis did not like how wild this guy was and she had to torture him for it. She had to do what she had to do to teach him a lesson and the lesson came in the form of shitting on him. As he ate her shit, he learned that she did not want any such nonsense and he apologized and learned to stop doing the things that she did not want him to do.