I'm not sure how you would make the transition easily. One day you are meeting in office and it is all about you and the next you are In a coffee shop and hearing all about her life? I know it is something I would want but I'm not sure if it would work properly in real life. Maybe a casual friendship meeting up a couple of times a year and just catching up might work better for me. Maybe I'm just not in the right place to a manage. Or even imagine something like this.
You obviously are, so well done! Can't wait until I am done with therapy. But you seem to have some concerns hence looking up the ethics. I suppose it might have been changed as t's felt they could make their own choices once therapy is over?
I wish you good luck with all this, but I would talk to her about it first so you both know where you stand. If it does work it sounds like it could be good for both of you.