It may not necessarily be that something is wrong with them but just a natural phenomenon. But of course some have problem. Sometimes women when not married they will keep to fit to get a man attracted but after getting married they no longer think of talking care of their body because they thinks it's no longer important afterall they are married. Some develop this body after given birth.. So the case is that woman are liable to get fat easier than men because they have so much hormonal changes than men.
I don't think so.
Women are very obsessed with real life things.
They want to be pretty as possible and life the best as possible, if they didn't get it, they will blame men. They would complain if what they demands are "realistic" instead of desire, example like in this situation, they know life is getting harder when they have a baby, if someone ask to this woman "why you're not pretty anymore?", she will answer "my husband failed to be a man, he's not able to fulfill my needs".
What you illustrate above is mostly for men, men loves are no longer same when they already married.