Lady Latoria knows that her slave will do anything to stay in her good graces. He will even pay her. She knows that he can't please other women so he pays her to sit next to him. She doesn't allow him to touch her because he isn't man enough for her but she will spend his money. He is okay with that because he always offers her money when he needs to see her.
When Herrin Amy is approached by a slave with a small dick, she tells him that he must have money to be in the same room with her. She knows that he will either pay or leave. When he stood there, she started telling him how inadequate he was and that his small dick meant that he wasn't a real man. She told him that in order for her to continue talking to him, she needed money and she watched him count off several large bills for her to go shopping.