I don't go to regular counseling sessions with my partner, but she knows I am available if she needs me to. She has a good relationship with a wonderful counselor. I do, however, have standing permission to speak with her therapist. I only do so when there has been a relapse in the PTSD symptoms, more to keep her appraised of my partner's progress (if hospitalized) and help link my partner to other avenues of assistance. I would not hesitate to call the therapist if I observed any behavior that concerned me, and would encourage her to schedule a session immediately. (This is not something I would ever abuse.)

If she's going to a new doctor or other treatment provider, though, I always try to meet/speak with the person and accompany my partner to the first appointment(s). As her partner and "carer," it's my job to support her through her treatment. Unless she would get into a crisis mode where her well-being was endangered, I let her drive the car but I help her read the map.

Hope this makes sense. :-)