I once worked with a man who was married to a woman who was only happy when pregnant. She was a nice enough woman, but she turned into a psychotic about 3 months after birthing. After the 7th kid, he had himself "cut". She divorced him 6 months later and last I heard is on her 9th or 10th.
Now while I have no idea if that occured here...sound eerily similar.
I know someone a year younger than me with 8 kids. She seems to be the same way.