In the old patriarch's mind, only blindfolded dudes with narrow minds and thoughts would decline mating the two together.
If he had to even act as the matchmaker between the two, he already decided on doing this even if his son objected to such a thing.
Yet things turned out to not need his intervention at all to make the two get together and be closer to each other. Then how come he wouldn't get excited about such an unexpected twist in events?
As for the fourth elder, he knew even if the patriarch said it casually, he meant each word he uttered. He could also guess the source of trouble the old patriarch warned him against, Berry's father.
He planned to never tell that madman anything at all. He wasn't crazy to do it or else he might also get part of the heat of that man's fury.
So, he decided to keep his mouth shut about this secret, even if he had to take it to his grave.