Mistress Marlena was out to send a message to this guy and she did it with her shit femdom. She knew that the guy would not learn his lesson the way she wanted him to and that is why she chose to make him eat her poo and drink her pee. He did it as she did not care what he felt. And she made sure he ate it all.
Mistress Marlena did not want to let anyone mess with her. She did not care what position that person held. Her boss crossed her line and she did not care that it was her boss. She had to punish him. The mistress had to do it the best way possible and she ensured that he ate her shit and drank her pee. It was shocking to him but he feared her too and did not do anything to her.