Hypothetical: If a husband is going to cheat, is the wife better off ignorant and blissful or knowing and devastated?

I thought of this question as I read the over 100 responses to the question asking if the “other” single woman is as much to blame for an affair as the married man.

I can see it is a topic many people feel strongly about, and the arguments seemed to be going around and around.

As I read the arguments and opinions, I thought of this: If a wife is going to have a husband who cheats (for whatever reason – he has the opportunity, whatever), and in all other ways their marriage seems happy (they travel together, they have nice holidays together, they have family that they both enjoy spending time with, maybe they’re grandparents now, etc.) is the wife better off not knowing he’s cheating and so “ignorance is bliss” and she goes on living her happy life (yes, it’s a sham life but to her it’s happy), and adoring him, or is she better off knowing he cheated, so she cannot ignore the fact, and they have a devastating divorce and their happy lifestyle is over?

Assume the husband’s cheating is one that the wife would have a hard time finding out about, like he travels for a living or something, and he’s not in long term affairs, he’s doing “one shot deals.”

No, I’m not having an affair with a married man or thinking about one. This is purely hypothetical, and as I said, based upon thoughts I had as I read the other question about the single woman’s blame in an affair with a married man.