What if you wrote down your last post in a short note, and gave her that before you give her the main letter?

I have noticed that people often worry they will overwhelm their therapists. But I can't recall anyone reporting that their T actually was overwhelmed in a session. Sometimes T's get burned out, but that's a longer process involving all their clients, it's not because of any one client's stuff. So, my theory is, this stuff feels absolutely overwhelming to us and so we feel like we're going to be giving too much to our T's and they won't be able to handle it. It's a misplaced fear I think... they're in the business of handling this kind of material. She'll be okay with whatever you throw at her on Friday. If it changes anything I'd imagine you'd have a deepening of your relationship and a new level of acceptance that you would feel from her.

I also think it's okay to ask them to change their style a bit. If you say "When you do the blank slate / stuffed owl thing while I'm crying I just feel ignored like when I was a kid," she might be able to adjust. I think that's fair, because they do work toward building a rapport with each client and their demeanor can be part of that.