Mistress Anni wanted to humiliate this guy and she found an easy way to do it. He had a small dick and the mistress knew that that was gold. She did not need to find anything else to make fun of him. That was enough for her and that is what she used to humiliate him and to degrade him in the process. He cried at the mean things she said about him and his dick.
Mistress Anni felt that the fact that this guy had a small dick was good for her as it helped her to make some good money from him. The mistress used her blackmail fetish to control him and also make him shower her with money and other things in order for her to keep his secret. He did not want anyone else to know it and that is why he paid her.