This mistress felt that she was taken for granted and she did not like it. She knew that her boyfriend did not know her well and it was up to her to show him the other side of her. The nasty side. And so she did this by shitting and blending it for him to drink. And she made sure he did. He never took her for granted again as he knew she was not as harmless as he had thought.
This mistress wanted to disgust her slave. So she made him watch as she took a shit. She did not bother to tell him to touch it, smear it on himself or even eat it. He just had to watch as she took a shit. He saw everything from how she took a piss to how the shit left her asshole and the resultant mess. Then she told him that was a warning.
Mistress Emily felt that she needed to teach this loser a lesson he would not forget in a hurry. She took him to her bathroom and she turned him into her asshole. She got him to eat her shit and she smeared it on his face. He was tied up and could not do anything about it. He was at her mercy and he learned not to mess with her.