fallen, that sounds like a really hard session.

If it were me, one thing I would want to know was why she acted so differently in the session than she usually does. I would want to check that perception with her. Did she think she was acting differently? If so, why did she do that? Is she trying a new type of approach? If so, what is it, why does she think it will help, etc.? If not, I would give her examples of how she seemed to be behaving differently during the session. Maybe she doesn't realize she was doing that. Or maybe what you thought you observed was a misinterpretation. I think there is a ton to talk about here. Maybe a starting point to check perceptions would be to tell her that she appeared shocked when you mentioned SI, and ask if she did feel that way. And if so, why, since you have talked about SI before. It seems there are a lot of places you might start the discussion....

I think it is very unsettling when a T begins acting differently. My T is usually pretty consistent, and I think that helps me trust him. There have been a couple of times when he seemed "different". One time was very upsetting for me and I called him later and he was very stern on the phone with me, but explained himself. And even though I didn't like how he was with me, I felt better when I had understanding.