I actually disagree with the judge's ruling. I think it's a $#$ed up situation in which a father signs a contract agreeing to give him educated and employed children money, but he signed it.
EDIT: Nevermind on my original point, I"m sure the guy could claim that he didn't receive consideration and now that his wife divorced him, technically that could break the contract. Also, I wonder what the kids think. "Son and daughter, I'm going to try to make up with your father in return for him to continue to pay you rent."