Unless those two therapists aren't licensed yet, they probably won't be supervised by the same person in the context me and other post are referring to. Even if they were both unlicensed, there probably wouldn't be a way that the supervisor would give one details from the other. The two might have the same director at the clinic though. Sometimes in a clinic therapists might consult with each other, but can't use identifying information. Are you worried about your wife finding out details that your daughter's therapist?