The key to marriage is the woman. A happy marriage is one with a wife who embraces her true femininity, loves being a woman, knows her value, and loves honoring her husband as her head and her role in raising her children and loving her husband.
Don’t need to go much further than that really I don’t think.
And related to what you have said, if the mother is happy, everybody’s happy. If the mother isn’t happy, nobody’s happy.