Maybe talking about this is bringing up feelings that you've trusted someone and they've betrayed you ? All that stuff is in our " cupboards " and we try to keep the door closed on it but it keeps bursting out until it's reprocessed. I do well with EMDR though it's hard work. I did get let down by a T the same sex as an asshole parent , but she was an asshole T. But I don't think talking gets all of it and it needs other things - your T's approach sounds very good. When I first entered EMDR ( with another T , not regular T ) the first thing we had to reprocess was me getting retraumatised by the asshole T. Good luck with whatever you decide.