Welcome to the forum.

If I was you (which I'm not) I would not go back to that therapist. The therapist does not sound helpful for the partner/carer in dealing with PTSD, so I'm not sure what good it would do for your relationship. I would offer to go to a separate therapist for marriage counseling, and I would look for one who has some experience dealing with PTSD. If I was going to someone to talk about the TERMS OF A SEPARATION it would be an attorney or a divorce mediator, not her therapist. Certainly, I would not agree to anything in writing, if I went to the meeting against my better judgment.

Cowgirl