The woman doesn't know and that comes from some investigation I did and from what he told me himself so to say that I don't know something when I was in the situation is indeed nonsense
So, you claim your understanding of his wife is based on what this known liar told you? How does that work?
Secondly, you "investigated" this woman instead of having the decency to speak openly to her. And before say you were fearful of what this man would do, I don't believe you. If he was a threat you wouldn't "investigate" his life or wife.
Thirdly these assumptions you made about his wife must be 6 years old, so are irrelevant to now.
And to justify your proposed actions with "Well it very much [my business] since he is the one that deceived me" shows that you have an entirely egocentric attitude.
I'll say again, I understand the devastation of deception. I bet lots of posters on this thread do. I have also noted that you have berated those who know of infidelity but don't speak out. But you haven't acknowledged that you did exactly that 6 years ago.
And that comes back to the fact that you seem only able to view the situation from your own perspective. Because you were a victim of this man's deception, you seem utterly unable to consider the perspective of his wife. He was responsible for cheating and lying to her. But you are responsible for your actions. I'm not saying you had a responsibility to tell her, I'm just reflecting your statements about other people not speaking out.
You haven't engaged in any discussion about her feelings and how massively more complex it is 6 years and 2 children down the line. You simply say "you wouldn't want to live a lie"
You haven't for a moment considered any opinion other than your own as valid. And the intensity of feeling you still have is not healthy.
Please, take stock. Reflect. Ask why your threads get such such a majority of posters vehemently disagreeing with you.
I know you've said you are not going to contact her but this thread really has exposed how unresolved your feelings are.