Yelling doesn't hurt anyone. I think I'd get up and pace, like I'm thinking of walking out but trying to give T a chance to talk me down.

You can try to start a session by saying, look, I want to talk about my habits but I'm worried I will get extremely angry at you. I'm tired of being told I'm lazy when that isn't the real story. --This way, T is prepped to be more careful, more caring in approach. Could that work?