The last time I saw my father he actually apologised for the abuse me and my brother received from him as we were growing up. It's the nearest to genuine remorse I have ever seen from him, but he of course went on to ruin the moment with pathetic JW posturing and a comment along the lines that I will die soon anyway.
It was amusing in a perverse way, it was the first and only occasion that my wife has met her father in law and it wcould well be the last time. It was also the first time in 10 years that I had spent any time with my father, just a few weeks before we emigrated.
Even when they do make a tenuous admission of guilt, it is always in a two faced way or they manage to get a parting shot in there somewhere. Fortunately I have moved on from the anger and was able to walk away without punching him although I was so damn tempted.