If the therapist felt so strongly that she absolutely had to inform the psychiatrist herself, she should have told you that was going to do so and preferably called him while you were present in her office. In general that’s what happens when a provider feels that a client is in danger. Paternalism is kind of inherent in that model of care (and in some cases is a legal responsibility) whereas underhandedness is just shoddy work (and is never best practice though isn’t usually illegal).

If you have a tendency toward paranoia or difficulty with trust, it’s maybe best if your care team is completely upfront and transparent with you? Even when they’re telling you stuff you don’t want to hear.