Accepting is not agreeing.
The cliché says there are three sides to every conflict: yours, theirs, and the truth. Your memories undoubtedly differ from your son or daughter's. You are not required to recant your memories under pressure, nor must you validate an account you believe is fundamentally flawed.
What you need to do – if you want any path forward – is take their account seriously enough to examine it, rather than dismiss it out of hand.
Questions to Explore
What do you dispute in their account? Do you disagree with the objective facts, their interpretation of those facts, or the resulting judgment of your character?
Have you considered the possibility that they might be right? If you dismissed that possibility, what logic did you use to do so?
Could both your narrative and theirs be partially true at the same time?
If you discovered you were more wrong than you initially thought, how would that affect your future interactions with them?
Deciding

