What I've seen with my friends' marriages, is that the #1 cause of divorce, was the husband went bankrupt, or his career wasn't moving to the satisfaction of the wife. This was especially true when the wife was young enough that she thought she could land somebody better.
One friend, his wife decided to go work at a place where she would meet affluent men, found a prosperous lawyer, started an affair, divorced my friend and married the lawyer. She took the kids, too.
Yep especially if your wife / girlfriend is hot. You come up short financially and their gone in a hot second. I know. They have a limited window to capitalize on their looks and they’ll jump right though it.