You don't have to talk about anything you don't want to, in therapy.

However. I see the worth in exploring your reactions to her comment as fruitful work. It doesn't sound like she said the things you heard (that judging, condemning, inner voice). Working through it, exploring it, is what can help break the pattern, despite stirring uncomfortable emotions etc. That's my take but this is your life and your therapy, so the direction of your session is your choice.