I know uit's not my place to give a recommendation and if you don't find it useful you may as well discar it, but since you posted the question I'll tell you what i think. I've read some posts by you about your therapeutic relationship and boundary crossings and I don't recommend you ask her to lunch. It's not weird as you say, many clients want things like this. It's good to talk about it and often more useful than acting it out. Discover your needs from this fantasy. However, in your case, it sounds to me a little bit like your T doesn't know ans protect her boundaries well enough. You seemed to be confused and concerned in the past. What would happen if she said yes? How would you interpret her motives? What if she said no, would you feel rejected?