Her crazeee will rise to the surface soon enough. No worries. By the end, only those deeply in denial-themselves- will be able to rationalize her behavior.
Stay the course. Keep the focus on you. Try to remember the pain she is in-it makes it easier to swallow the really awful stuff. I sometimes think the "believe half of what they do" is a good rule for those of us left behind too. We have such a tendency to spin our own fantasies of what the MLC-er is doing. And, most of it, is in our own heads.
You can't control her feelings, thoughts or behavior. Let her go to figure this out.
Sounds like you are keeping busy and working hard at fatherhood. As it should be.
"You know, it's times like these when I realize what a superhero I am." Tony Stark/Iron Man
“Focus on what you can do, then do it with all your heart.” Lois Wilson