I can scan quickly so I looked at your old threads, but you might put a brief summary here for others without my speed-reading skills Just the highlights, like : wife left, now suspect OM was a factor, OM has now donated a kidney to her etc.
You sound like you are doing reasonably well, all things considered. It's tough when you are tied for the next 15+ years to dealing with her as a coparent etc. Even worse when sleazy OM is now going to be sainted for his kidney donation.
Not to dwell on your ex, since you are moving forward, but one thing I want you to consider about her. You initially described how great your first year together was. As a woman myself, though, I read about the scrapbooking every event of your first year and think (How I met Your Mother reference here) "OMG she's got the crazy eyes!".
People who believe in "soulmates" and obsess about romance often are the least able to make it through the tough times (and sometimes outright drudgery) that go with real life.
The reason I bring this up is, I want you to try to look at your ex without the rose-colored glasses and evaluate what red flags were present early on that you missed? What should have warned you that she wasn't gonna be good for the long haul?
You need to figure this out so that you don't make the same mistake in choosing partners going forward.
Now granted - she had a serious health problem that can cause depression, and depression is often a major factor in affairs (because infatuation briefly relieves it). Maybe she was perfect when you first met her. But more likely there's some personality or character issues that you just chose to ignore because it all felt so good in the beginning.
I was married for 24 years and it actually took me a long time after my divorce to really see my ex's narcissism. Ask your good friends if there was anything they noticed that you didn't?