Uh, I would not do that. Personally, I would run away, and run away quickly. I don't think that it is even ethical for a T to put a client in a relationship like that. I also think that is kind of strange for her to give that kind of treatment over other clients. It could create a sense of "specialness" in the relationship that could lead to other considerably less ethical things. If the relationship is good otherwise I would let her know that you are not ok with this, and that you don't want to be asked to do such favors in the future. If she pushes or asks for something like this again, I would find a new T right away.