If the honest truth is not negative, why not just tell it?
My ex and OM come up with some pretty complex explanations of "what happened" and how they got together. Explanations that scream of denial. My ex when she first met my new W in a one-to-one planning meeting regarding shared time with my kids... xw basically started with an unpromted explanation of how she ended up with OM. It was totally out of context of the discussion and out of the blue. I suppose that would be the deep blue guilt lying below the surface where she has neither the courage nor ability to access it, accept it, and deal with it in a healthy mature way.
Can you imagine living with such a thing. Such a thorn in one's side. It would be handicapping for life. It is so incredibly obvious to all involved... frankly it is painful to watch.
So.... whatever. Kids will one day ask the tough questions. I will let the truth migrate its way to the surface ather than me try to expose it.
So I agree.... they will be held to account of some kind some day. We need only worry about our own wrongs in life.