Oh mom problems....I can so relate...

Just let it go in one ear and out the other.
When you're all calm sit and have a face to face with her. Calmly tell her that she hurt you and that you are requesting that she take a little more care with what she says. Don't give her the opportunity to engage you in any way. Say it, say thank you, kiss on the cheek, and get up and leave.

(I have four kids and that's what would sink in for me)