I think you could still go the route of talking about talking about it...kinda.

What I'm thinking is, can you tell T that her comment upset you and that you find it difficult to see how T drew that conclusion. And then, talk about why it upset you, why you disagree, why T thinks the way they do?

My T has, on occasion, come up with things where my initial response was a fairly vehement denial, but we talked about it and in some cases, I saw her point and in others, she saw mine and agreed that perhaps her initial comment wasn't entirely accurate.