I wouldn't even bring up the window. If she does, then say "great".
I'm at a similar point as you. Unless the W is actually on board with the MR, the small talk isn't always useful if the WAS is being rude and trying to start fights.
H 34 W 29 BD 3/12/18 Divorce Busted Spring 19
It is not things that bother us, but the stories we tell ourselves about things.
