Mistress Dula had nothing to do with her ex but since he wanted to get back with her and he was trying to spend time with her, she chose to humiliate him and she used her sexy ass to do it. She first of all teased and denied him before she went ahead to fart on him. He had to smell all of the farts before she asked him to leave.
Mistress Dula wanted to dominate her slave so she tied him up before she turned him into a fart slave. She made sure he could not move before she farted on him. She even used an improvised funnel to fart on him. That is when he realized that she was not the person he had thought she was. She was cruel and sadistic. The lesson was learned the hard way.