My T doesn't have a supervisor (she's been in practice like 25-30 years), but she did consult with colleagues on an issue of mine that she wasn't sure how to deal with. She told me upfront she was going to do so (while maintaining my anonymity), and I was fine with it. I actually appreciated that she was reaching out to make sure she was making the right call. It involved my transference for my marriage counselor, who is also her coworker, and whether I should try to talk to him about it. I think she consulted two other therapists in the same office.

The practice where she works (has about 10 therapists and a few pdocs) also has weekly "clinical meetings," where they can bring up difficult cases or questions they have, while keeping anonymity. I know she asked about my possible reaction to a generic version of Paxil in there, too (she told me).