Wow this is really, really, really not OK! I have a very open and honest relationship with SO we are both in therapy and talk with each other about it frequently. But I would never ever expect to see any of his therapy records. In fact I know that he has some therapy records that he got from the school consoling center after we graduated, and he has them in the house, and I never even dreamed of looking at them. I have called his T once because he was acting very upset and strange, and I was concerned, but I never wanted to find anything out...and it the T did tell me anything about the sessions or what it says in her notes I would tell SO to get out and find a new T. That just isn't how therapy works. You don't share what goes on in there with anyone but the T. Personally I would let your T know what has happened and be very clear with her that you do not want anything released, and perhaps ask her to talk with or write to this bizaro wakadoodle T. Therapy is for you, and no one else, and if you choose to share it that is up to you.

P.S. you may wish to contact your T in writing saying that you don't want anything released, so you have legal proof it comes down to that.