Marrige can either be viewed as one of two ideals:
1) Till death do us part, no matter what..
2) As long as we both have mutual interests.
Marriage is like a business: it takes two to make the machine of the household work; a shared vision on not only of the outcome but also of those involved (children).
When objectives conflict, the business is going to take a turn. The question at this point is does rack other love the other with sincere wishes for happiness? Or will one judge a diversion in the previously-shared vision with disdain, judgement and contempt?
Just my humble perspective. Nameste.