I'm sorry you're going through this. Sadly, this is much more common than it should be. Regarding your husband's therapy, so much depends on who the therapist is.
My ex and I went to three different marriage counselors. By the time we went to the third one, I had read "Stop Walking on Eggshells" and had informed myself about the basics of BPD and was convinced she had it. I'm not exaggerating when I say that within 2 minutes of our first session beginning, I hadn't said a word yet and the marriage counselor - totally unprompted - starting going down the list of the DSM for BPD with my ex, asking questions related to each element in order. I immediately recognized this, and it was so validating that a professional had picked up on it so quickly with her. My ex had no idea why he was asking these questions.
I say that to say this. Even if your husband is trying to limit your access to the frequency or progress of his therapy, if you ever get into some sort of legal dispute with your husband, the therapist may be a valuable witness for you (or you may be able to subpoena the T's notes).



