My experience- and it is just that, my experience, not an indication of what others' experiences will be like was that I WAS ganged up on. I went in wanting to collaborate, cooperate, problem solve and it turned into the T saying "AH why don't you tell WTBH the things that are really difficult that cause you to lie"... When I finally got defensive and said, hold on, his T laid into me. Long story short, she was fired bc her supervisor THANK GOD was my T who was there as well (it was supposed to be a joint session but was coordinated by his T) and after about 30 min of this nonsense my T ended the session, and after a period of "clinical review" AH's T was canned.
So, I am a bit gun shy but I tend to think that unless his T is well versed in addiction and knows to not believe the A's version of reality, you may well be walking into a bashing session.