It sounds like this is causing you a lot of anxiety and guilt. I think you should go with your gut instinct. You know your therapist better than any of us. Try picturing yourself bringing it up in therapy. What do you picture your therapist's reaction to be? What do you want your therapist's reaction to be? Do those two images differ? And if so, will that impact your decision to bring it up or not?

I have never driven by a therapist's house. I have looked on Google Earth though. For me, it felt ok to do but then afterwards, I felt... naughty almost. Like I had invaded her privacy. I never felt the urgent need to address it in therapy. For me, I was curious and with my curiosity satiated, that was that. For me though, I think underneath it all, I did it because it made me feel like t was more human - that she had a house, a family, etc. In therapy, so much is patient focused. It can be easy to forget that the therapist is a person just like us. I think that I was comforted by seeing her house and that was why I didn't feel the need to do it again or bring it up.