Lady Mira wanted to send her slave to a place he would be tortured if anything went wrong. So she tried to make him learn to handle all kinds of humiliation he would encounter and today she felt that the best thing to do was to humiliate him with her nylon fetish and get him to endure it as well as the smell associated with nylon stockings. She had a friend help dominate him.
Lady Mira was hard on her boyfriend because she knew he needed tough love. Anything less than that and she knew she would lose him forever. So she trampled him while wearing nylon stockings. The mistress knew that he had to be tramped and crushed and she did not hesitate to do it so as to send a warning that she was not going to accept anything less than what they had agreed. And she even took a selfie as she trampled him.
These mistresses wanted to trample this guy and they did it while wearing their nylon stockings. The mistresses wanted the nylon stockings because they knew that they sweated easily and would hence have some smell on them which was good since they wanted to dominate and humiliate the guy. The guy had endure the smell as well as the pain of their trampling before the mistresses were done with him.