The wife would probably notice the withdrawals from the checking for a paid escort, which is about the only way an average guy could cheat.
It's a basic fact that most of the "bad behavior" of libertine men (rightly) lambasted by women can be attributed to a very thin slice of all males - namely: to the smooth-talking, athletic "Chads." But women want to shame the majority of (innocent) men and hold them accountable for the misdeeds of the small minority of "playahs."
I don't know if this can properly be described as "Moving the Goalposts," or if there is some Latin designation for a fallacy involving redefining - mid-argument - the terms. Maybe "equivocation?"
"All those women enjoying their 'hoe phase' had the cooperation of willing men, so when those women exit their peak years, men should be forced to step up and marry them and provide for their broods." - Sounds logical, on the face of it, right?
But in reality, the "men" in the first part of the argument are not identical with the "men" in the second part of the argument / conclusion. Rather, they are two wholly different subsets of "men."
Regards,