Getting upset by something T says, dissociating, getting fuzzy, becoming exhausted... sounds like a form of uncontrolled exposure therapy. And sounds very distressing and maybe traumatic. I can't help thinking about first-do-no-harm.

It's common to talk about the client needing to get grounded before end of the session, or having trouble coping later. But these are signs of emotional and nervous system dysregulation, and if the session is that overwhelming then what the hell is going on?