Finances, her dad, instability all definitely affected her. Very common reaction on her part.
You two have processed virtually nothing.
The biggest issue is her leaving her children. That is huge, and NOT to be taken lightly.
You need to insist on some counseling, really. You two are not going to solve this on your own.
All the best, -NOPkins-
I will ferret out an affair at any opportunity.
-An affair is the embodiment of entitlement, fueled by resentment and lack of respect. -An infidel will remain unreachable so long as their sense of entitlement exceeds their ability to reason.