One problem
Wouldn't the kids have wondered (or even heard) what their mom was ranting about before they went to dinner at the end of the movie? They must have asked and even though Katie and Ben liked to act like their kids were still 6 (calling themselves Mommy and Daddy) I hope they would have been honest about being this close to a divorce. Especially since the daughter already kind of knew that they were having problems. So I assume that the kids ended up living in constant fear that their parents are going to split up. What a happy ending!
Don't puke in the punch and tell me it's alphabet soup.