When Finally10 wrote his timeline for me, it was also in narrative form. He had remembered some details clearly that day when I had challenged him on the logic of something he had been claiming so he wrote it out.
It was hard to read, like you mentioned. Twistedly fascinating too. He says it was hard to write. I've read it a lot.
There are still some things that don't make sense to me, but he says it's all he remembers. Some of the new details he wrote in bothered me. He was more caring and spent more time focused in her pleasure than I was originally told. Like you, it felt more real to me after I read it. Processing is still ongoing for me. It takes time.
It was a good exercise for my WH to write it out and have to write the words down where he couldn't evade them. It sounds like it opened your H's eyes a bit too.