Not to sound morbid, but I wonder if he sensed his time may have been coming and THAT'S why he suddenly mended fences with Vince. Maybe it wasn't so much that he forgave the stuff the old man has pulled, but maybe it was a business decision to secure provisions for his family.
If the latter is indeed the case, I've got to tip my hat to him. It was a very smart move that will substantially help his family now that he's gone.