I would imagine almost no one in America ever noticed this before, mainly because it is from the awfulness that is Yes, Dear, truly one of the worst sitcoms in television history. However, as this clip—originally aired 11/2/05 shows—Anthony Clark and Mike O'Malley clearly knew all about Tiger's indiscretions.
I can't believe this show had 6 seasons. 6! And yet Arrested Development got only 3?!? I hate television executives.