Yeah it sounds like your T might have slipped a little with her emotions. Em, I am certain that this is an emotional process for her just as it is for you and if counter-transference is going to occur this would be a prime time for it. And CT is no more a dirty word than transference is. It happens, that is why they get schooled and supervised. BUT, I understand how dizzying it can be to experience such a slip. But one thing about this relationship is that it is repairable. I know you have little time left with your she T, but this does not sound like a terrible breech. You are of course wobbly and insecure because of the termination process. The fact that it stirred massive transference for you again is nothing to be ashamed of, but I am sure you wish you could just part with calmer emotions. But definitley communicate this to her. I think it was a genuine expression. It was a slip, not a violation.
My T slipped not that long ago and did something she is never inclined to do and we talked about it. We are good. She is human, she is fallible, and I am not injured. And trust me T's worry about injuring us when they slip.
I hope this helps bring a little comfort and relief to you. And remember to breathe.