Book smart vs. Street smart, or what, high brow vs. low brow, there are various sets of comparison to the fight between such class issues.
But if I may say, the gorgeous doctor son is smartest of all. All he needed to do is to smile at two of the most important women in his life, and was able to keep himself out of the way. In the end, they solved THE problem, which is, to be exact, HIS problem.
He should be way relieved by the melting of the ice between the women, gosh we wouldn't be able to see how smug he is going to look like in their Hawaii honeymoon.