I'm so confused. Sorry, ADD moment
However, two things I have a hold on...a client can bring what they want to therapy. If that client is also a T, they should not use names of clients, just to be professional really, but a big part of why Ts stay in their own therapy (or should) is in case a client knocks their own stuff, and it often happens. So it's really reasonable ad expected that a T who is a client may talk about their own clients with their T.
Also, in the uk anyway, it would be considered a boundary violation if a T saw a T as a client, and also their client as a client.
Because of the above. Most Ts won't work with close friends or relatives for the same reason. Yes, the OP was overstepping boundaries by approaching her Ts T, but they're not her boundaries to keep.
Her Ts T (man I'm so muddled) should not have consulted with her IF he knew she was his clients client. If he did.