Some do remember most of what they've said and done. Will they admit it...that's the question of the day. Whatever, they do or don't remember...that is on them. It's not something that we need to worry about. It is truly up to them to rebuild the bridges that they have burned along the way If they don't, it's their loss.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.