Here is a book about a woman who walks away from her husband and her three children. She has been feeling unloved and unneeded, and on impulse leaves and starts a new life elsewhere. Boringly, she ends up going back to them. I wanted the worm to turn, but it kind of just took a detour.
What I did find interesting was that the woman is only in her early 40s. I had heard before that in the past you were considered largely useless at that age as a woman (having done all that was required of you, i.e., reproduce) but this was a particularly sad and stark example of the problem. She really seems to feel her life is over. Today, most people of that age I know are just gagging for their kids to grow up enough so they can begin getting really crazy.