Oh, lost, I am so very sorry this happened. I know I would be super, super angry and hurt. I would feel totally betrayed by my T also. I feel like we have a base of honesty established, and although it's not his job to protect me, it is his job not to deceive me. I think letting you continue to believe something he knew to be false is the same thing.

I hope that you are able to confront your T with this. He made a huge error, in my opinion, and I sincerely hope he owns it and apologizes.