This mistress had beef with this guy and she wanted to have fun at his expense. That is because she did not have any other use for him. And since she did not have anything better to do to him, she felt that it was easier for her to turn him into a sissy and humiliate him. That is what she did as she had him wear female clothes and do the crazy things she ordered him to.
This mistress knows how to turn on guys. She needed some info from this guy and she was not sure that she would get it from him so she had to use a different tactic to get it. That is why she went out of her way to tease him and turn him on after which she controlled him and had an easy time getting the info out of him.