I like to think he knows what he did was wrong, and he feels ashamed. More likely, he feels he was unjustly accused of lying, and harbors bitterness from it. He thought he would turn my dad against me and my other siblings, and be the sole heir to dad’s fortune. So he spent 20 years kissing the old man’s ass (a terrible thought), is more or less reviled, and has nothing to show for it. So he lost the family’s good graces, and still won’t even be able to cash in on what he did.
He never had children of his own. He does not know his own nieces and nephews. His wife is a pill popping boozehound. So it leaves me scratching my head. What exactly are you trying to accomplish?