Mistress Liza wanted to make sure that this guy learned never to go back on his word or to do anything that she did not want. That is why she cruelly had him fuck her boots. She did not even give him any lube to use and it was painful for him. But she wanted him to work through the pain and make sure he came before she stopped punishing him.
Mistress Liza had to punish and dominate her ex. She thought of what to do to him for her own fun and she settled on using her boots to crush his dick. She enjoyed doing it and had a great time but she did not lose sight of why she was doing it. She had to make sure he got the lesson and that he never tried to bother her.