This mistress wanted to dominate as well as humiliate this guy and she did it without caring what he felt as he was a bother to her and she did not want him to continue doing that. The mistress met the guy at the gym and he had a crush on her and he bothered her a lot until she had to do something. That something was to crush his face with her sneakers. and make him lick them.
This guy was a certified liar and this mistress did not want to deal with his kind. She felt that he was the type to be punished as well as humiliated and she did not hesitate to do so. She felt that he would need to be punished and making him feel pain was part of the plan. That is how it got to trampling him with her high heels.