Your spouse files for divorce, and you know right away that you're going to have to sell the house. There is no way that either one of you can afford it on your own. You'll need to buy two new homes after you make the split official.
Everyone has expectations when they get married. When the marriage itself does not match up with those expectations, it can lead to divorce -- even if the other person isn't really to blame.
Dissolution of any relationship can be a painful situation to encounter, but the tension can be especially thick when it involves children. If you and your long-time partner were raising a child together prior to the breakup, you expect him to pay support to help you cover subsequent expenses. What if he suddenly denies that the child is his to support?
After divorce, relocation can get a bit harder if you have kids.
When you get divorced as a parent, you may be tempted to let the rules go. After all, you feel like you dragged the child through the divorce. Sure, the child custody arrangement keeps both you and your ex involved in your child's life, but you know it's not the same. You feel bad about that, even if you're glad you got divorced on a personal level.
Adopting a child is a huge decision, and it's one that you have to make for all of the right reasons. It's not just your life that changes forever, but the child's as well.