Oh, I like that @alive -- and that's the rub, you see. That kind of "Booyah! Howya like me now?" IS my "normal instinctive response" that I was sort of thinking I might try to get away from.
I agree!!! Good. But, in cases like this, it is not just appropriate but essential to your self-esteem that you own your time and space. You don't have to do it with bravado. It can be very friendly.
"I've got a lot going on this morning. Can you tell me what's up so I have a better idea of what you need from me?"
Something like that.
Or, you just call her and if it isn't a justifiable "urgency" you tell her, "I am more than willing to discuss this but can't do right now, I'll call you at whenever o'clock."
The point is, however YOU are able to stay centered and manage your life and emotions is what matters right now.