Lady Despina found that her friend wanted to dominate her slave and since she had more experience in trampling and slave humiliation than her friend, she agreed to help her friend do it. They both did it and had fun trampling the slave who was stripped naked and tied up. He cried and was ball crushed as well but that did not stop the mistresses from what they were doing.
Lady Despina had a new farmhand but she quickly realized that he was not adding any value to her and so she made a point of humiliating as well as dominating him. The mistress used her high heel boots and she did this so that she could inflict a lot of pain on him. And that is exactly what she did so which led to him learning his lesson painfully.