Men definitely do not want to raise another man's children. Part of it is also age.....after several years of marriage she's may well have aged well out of her peak years. Another potential negative is that most people who have not been married would prefer it not be their partner's 2nd go around. All of those kids, age, experience, would be negatives in the dating market.
Oh I'm sure. What man wants to deal with the trauma other men caused? That's no fun! LOL!