my pdoc does this, and my old T used to do this, also. but in a very anonymous way, and never with any real sort of identifying detail. e.g., pdoc might say he has another client working through similar stuff as me, and this is what has helped her. or old T would tell me about how different clients worked with him (some wouldn't shut up, some had to be coaxed to nod/shake their head in response to a question).

but neither of them would have ever said something as in as much detail as what you've described here. i would be pretty uncomfortable about that level of disclosure, too.

my current T tells me a lot about himself, and his own (past) issues, but i appreciate that because it's intended to help, and he's only disclosing about himself.

i think you're right in that you should probably bring it up, but i'm scratching my head about how to do so. i would probably wait until the next time it happened, and then say something like "i hope you don't tell your other clients that much about me". i still think that's kind of imperfect though...

hopefully others will chip in with other (better!) ideas! i agree that it's an awkward situation you are being put in.