If you like the t, I would go to next appt and tell t that you saw her at the breakfast spot and are upset by that. And give her a chance to explain.

If you don't like the t, I'd cancel any upcoming appts.

The thing for me about looking for reasons to quit, is that I magnify small stuff and then would have trouble discerning what is a big enough deal to quit over. I would always be second guessing myself.

At this point in my therapy, I would probably be mad and I would probably ask about it and see what happens. Lying like that is not ok.