Mistress Christina felt that this slave was too vain for her and she could not let it go much as she wanted to. So she did what she does best and she used her hot ass to dominate and to torture. This included shitting on him and making sure that he ate all of it and that he licked her asshole clean. He never expected that from her but she did it anyway.
Goddess Andova did not have money to pay someone who did such a poor job for her. She felt that the guy had to learn his lesson the hard way and get what he deserved. And after much thought, she felt that he deserved to eat shit and that is what she made him eat. She was not apologetic about what she had done as she felt that he had also done a shitty job.