ugh. If she's a good T otherwise, I would try to let her know you don't like it. You shouldn't just tolerate it though, it makes you uncomfortable so it MATTERS.

My xt used to say "okay my dear" all the time, and I hated it. He also continuously touched my arm, back, etc. when I was leaving. I was constantly cringing when it came time to go. It isn't okay if you don't like it.