That might not be true. They could have waited to see the impact on ratings after a few months before deciding if they should be replaced. I don't watch GMA but I heard Robach was very popular.

I don't know people say they were "proud" cheaters or that they were acting smug when they returned to the show after the scandal was revealed. They couldn't exactly cry and get angry on the show. They were filmed without their knowledge. Yes it was stupid to be out in public together but they might have already privately separated from their spouse or at least talked to them about ending the marriage but stayed living together for the sake of the children.