Mistress Iside wanted her slave to learn that things did not happen the way he wanted. He was trying to turn her into his slave instead of him respecting his position as her slave. She was not going to allow it and she made him eat her poop straight from her asshole for him to know his place. Needless to say, he never tried messing with her as he knew what would happen.
When he ignored her, mistress Iside had to humiliate this slave because she did not want him to think that it was ok to do what he had done. The mistress facesat him after she had made him kneel down. He was then forced to eat her shit and drink her urine as punishment. He did not believe what happened to him and he even thought he was dreaming but it was real.
Mistress Iside was angry at her optician and she had to punish him so that he did not make the same mistake with others. That is why she chose to use her shit to punish him. That way, he would not forget what he had done and he would never repeat it again. The punishment worked as he became keener in his work and he never had issues with anyone again.
Mistress Iside had to make sure this slave ate all of her shit and she went ahead to record as he did it. She was punishing him for the mistakes he had been making. She had given him time to correct himself but instead of doing that, he continued to make more mistakes. She did not like that and she had to do something about it hence punishing him with shit.
Mistress Iside found out that her boyfriend had been lying to her and she was not amused. But she knew that she had to do something to make sure he did not feel comfortable lying to her. And so she made him eat her shit and that sent him the message that he would regret it if he ever messed with her. He did not as he did not want a repeat of the domination.