***There have been some rough patches***
Bingo.
And the underlying issues the above article tend to be exacerbated during rough patches. Times get tough, that brings out the worst in people and poof! There goes the marriage.
They can also bring out the very best. Years ago I was taking night classes and working full time. I got laid off just as a new semester was about to begin. The very first thing my wife said was "Great now you can go to school full time and be done that much quicker"