Your comment got me to thinking about BO and MO...do we ever see pictures of them looking happy? Rarely, if ever. He's always got that wide, stupid-looking phony smile on his face in some of his photos, but I've rarely seen any of them together looking happy.
The same can be said of the Clintons. Sure, Hillary knew of Bill's philandering going back to his days at Oxford so you can't or shouldn't expect any closeness between them. And she certainly knew about it when, in a defense of him during the Gennifer Flowers scandal, said that the Flowers scandal was nothing more than a "Vast Right Wing Conspiracy".
Contrast all this to George and Laura Bush -- or George H.W. Bush and his wife Barbara. There's something strangely fake about these liberal/democrat couples.