Subpoena a therapist?

If I subpoeana my own therapist, is there a limit on how much she can tell them? I want to discuss what she saw of my child when I brought her there after she told me of Kathy’s physical abuse, but I don’t necesssarily want everything I have shared with this person to be wide open.

Would the other side have to subpoena my records, or would that be a discovery-type issue?

The other side is limited in their cross examination of a witness to the scope of what you ask on direct examination.