I'm sorry your T did not want to hang the crystal in her office. Did she "reject" the gift by returning it to you or just taking it out of the window? I am not judging, but as it was given as a gift, it is really up to her what to do with it. Seeing as she has accepted gifts from you in the past, I am sure she receives quite a few gifts from all of her clients. If she displayed them all in her office, I can see where this would become a problem. In this case, she appears to not want to impact the needs of other clients. Therapists are always advised to keep their office decorated in a neutral manner so as not to distract clients. I for one, notice everything in my T office. I used to sell custom window coverings and I notice EVERYTHING on windows. I have commented on the fact that I don't like one of my T pictures on the wall, or point out that another one is crooked, or his drawer is ajar. It is a bit strange that she said the office "is ours." While you share the space when you are in session, it is her office that she pays for and decorates as she chooses. Maybe just agree that she accept the gift but not put it in her office.