Holiday Wishes (the stroke, 9)

My mom has an interesting way of coping with her stroke recovery: It never happened.
Or more precisely, remind her that it did happen at your own peril.
The other day we walked past a neighbor* whom we hadn't seen in awhile.
"Hi there," she called from her doorway, "It's nice to see you up and around again."
Mom waved, but said "Shut the fuck up." under her breath.
Except she forgot that remarks under one's breath should be out of earshot of the target. She was pretty loud. Had the neighbor heard? What was I to do? If I knew for sure she had heard the insult, I could explain that the stroke had impaired both her manners and her choice of words. But what if she hadn't heard? Was I supposed to go up to her and say "Listen, I don't know if you heard my mom throw the Big F at you, but if you did, she didn't mean it...?" Yeah. That'd be a new way to get a door slammed in my face.

*They now live in a much friendlier neighborhood than the one from the "Fear thy Neighbor posts"