Earlier quoted context omitted.
That there are situations where women have affairs and get pregnant in very narrow timelines then have their partner think it’s their child. Putting the morality of this aside and speaking practically, unsuspecting men should have a DNA test if the timeline of conception feels off or extraordinary.
Does it really matter whose child it is? You seem to be writing this as if she might give birth to a goblin or something like that. I can't see what's "speaking practically" and "putting the morality aside" here, because there's not really any practical difference.
Umm what? Do you not see the inherent breakage of trust if your wife is having sex with someone else in a monogamous relationship and then trying to pass off someone else' kid as yours?