Just thinking about this...
I know I trust you. I really do. And I would never do anything that violates boundaries or your trust in me, if that even exists. After last night, I believe you must at least trust me in some way, leaving me alone in your office with files within my reach.
Of course, I'd have loved to get a sneak peak into your notes about me, but, hey, I think our relationship is good enough that I can ask you anything I want to know.

I am the kind who always carries everything with me when I'm with clients or students. I feel quite honored that you dont think that's necessary.