This mistress was tired of the kind of things she had seen her slave do and she knew that it was time for her to do something different if she was to have her slave change tact and do things the way he was supposed to do them. That is how and why the mistress cruelly used her dirty feet to trample him and inflict a lot of pain on his face.
Mistress Debby felt that the beef she had with this guy was not necessary and she had to end it. She did so using her trampling fetish and she ensured that the guy learned his lesson the hard way. The guy was in pain as the mistress crushed his face with her bare feet and laughed at him while he was in pain. But he got the point she was passing across and the beef ended.