"Unless you cheat on her, and knock up the mistress. Then the mistress refuses to get an abortion. So then you can no longer keep the affair a secret.
Then the wife decides she doesn't want to stay with you. And the prenup doesn't work because you are the one that cheated."
Well...his ex wife mysteriously fell down a flight of stairs while he was in town and he gets a tax write off for burying her in the weeds on his golf course.