Maybe guilt, maybe your guess that she's mad you won't keep covering it up. Maybe both.

I'm not much help there. I vote that you focus on yourself and try to ignore her moods.

Me: 34 W:33
T: 10 M: 6
S: 6 D: 5
BD: 5/14
Still together(ish)
Not giving up: 7/14
D talk has slowed, a lot.
Gradually working on things together. Still separate bedrooms.
Slow and Steady wins the race.