Next time she says she can't, call her on it.
"You mean you won't."
...Because she physically *could* say it, after all it's just 7 letters, and easily pronounced...but it is her MIND that prevents her, and therefore = won't. She is choosing to disrespect you.
Well...you're about to get out of there, yes? In the military, we called that "being short." As in, having only a short time left.
SHORT!!! 😉