Granted part of what you're paying for is a perception of strict confidentiality, but I would be thankful he gave a damn and didn't let some blind obligation to theoretical ethics get in the way of possibly helping you. Half of us probably wouldn't need therapy if we were more open and honest with those close to us and especially ourselves about all that we think and feel. Just be who we are and not maintain all the different facades. Then there is nothing to feel betrayed over when everyone knows the same things. I am starting to ramble, but I guess what I wanted to throw in the mix is... maybe try to see past the feeling betrayed, you did acknowledge feeling they both had your best interest in mind. If it truly bothers you just tell Mr. T and I think the odds are he won't do anything like it again.