May be it is daughters. About 5 years ago DD and I were chatting one evening when she took a deep breath and said 'I want you to listen to me and not interrupt, She then listed a whole range of ways I had failed her when she was a teenager. I listened. When she had finished she just picked up the threads of the previousconversation as if nothing had interupted it.
I was gob smacked. Yes, there was some truth in one or two of her comments but most were nonsense, but I said nothing but discussed them with, first, DH, who agreed that a number of things she said were incorrectly remembered because his recall was the same as mine, and then with DS, who also corroborated my memory of events. - and actually was angry about some of the things sge said, but I said he was not to mention the subject to her - and he hasn't.
In the end I decided to let sleeping dogs lie. Nothing I can say or do is going to change her mind about what happened in her teenage years, and arguing about it is not going to do anything other than make things worse. i am not sure that she even remembers the event. But I do.
ex-dancer , all I can suggest is when she starts up again, just give her a smile and say, 'well this is a subject where memories may differ'. Say it when she tells the story to others. Nothing either of us can say or do is going to alter what our daughters belief in what happened. The best thing is just shrug it off.
I have just altered all my post Christmas plans because this last weekend my DS and DDiL said they were looking forward to doing certain things a certain way when they came down after Christmas, just like we used to do pre-COVID- except that neither me, DH or DD have any memory of doing what they suggested or anything like it.
But they and DGC are convinced that this is what the past was, so we will do it.