Do you have friends who are therapists or Pdocs? Off-hand I can think of 7 friends who fit this category. We never talk about my mental health or my T, or my T's name. I'm pretty sure my T knows most of them.

ALSO, my T and I have a lot of mutual friends. Only one knows that she is friends with my T (because I told her).

Once I was at a party, and an acquaintance asked about my hobbies, and I told her, and she said, "Oh, then you must know my friend, "T's name." I said, "Yes, I do know her." It was awkward for me, but don't know if the acquaintance noticed anything unusual about it. [In case this whole thing is misleading or confusing, my T and I have some of the same avocations or hobbies. At first it was awkward for me; I don't know how it was for her. Now, it's mostly ok for me. If we are in the same place, I usually acknowledge her with a nod or a wave, and then she might walk over to me. We usually bring it up at my next session.]