Mistress Mystique had an admirer and she wanted to use that to dominate him. She did not feel what he felt for her and she wanted to take advantage of that to have fun. So she baited him with her hot and curvy ass. He fell for it and he was shocked at how she turned him into a human toilet. He had to eat her shit as he did not have a choice.
Mistress Mystique felt that this guy was too loud for her and she had to do something to make him stop being too loud. She had to control him and that is why she went ahead to shit on him. He cried as she punished him in a disgusting manner and had him not only eat poo, but also drink her pee. The mistress enjoyed it all and knew he would change.