Ivy has been using her step-son's Nathan's inheritance to live it up and he's had enough. In his mind she's just another gold digger and that's just one step away from being a whore, so he decides if she wants to be able to use his money, he is going to be able to use her

Ivy's relationship with her step-son is very different now that he laid down the law. Nathan comes in while she is cleaning to let her know that he will be making use of her anytime he wants