you should be able to say I had great weekend and loving this feeling and want to keep it for while as long as I can so I can integrate it and own it (so it is not just a fleeting experience) so today I do not want to talk about my past or the future but just chat.
You are paying for this exact thing and should get it.
However, just the nature of therapy, you may fall into reflection or introspection and then what is the therapist to do?
If your expectation is the therapist will talk about her life and her light and her fun over the weekend, that is unrealistic expectation and you cannot force a phase in treatment that you have not reached naturally. and if you push it, you will fall into rupture or worse.
Prepare yourself, set realistic expectation of the therapist not sharing her life and having over the coffee conversations with you and you are fine. Otherwise, you are experiencing flight to health sort of and think you are end of therapy phase where every session may feel over a coffee with a friend - a sign of termination of treatment.
As long as you are aware of the therapist' boundaries and not confusing her as a friend, you are fine.