So...he's cheated repeatedly but now he's been caught he says he'll never do it again, but he's suffered no consequences in fact you're 'getting on better than ever' - do you realise that's how he'll justify his next infidelity? 'It actually helps my marriage'
I think there's an element of shock/denial going on.
Some couples do survive infidelity but when they've had proper counselling and genuinely faced up to what's happened and addressed the reasons the unfaithful partner chose to cheat (and it IS a conscious choice).
I'm open to the idea of non-monogamy for some couples, I know some and I'm not monogamous myself (but I never enable cheating).
This isn't non-monogamy, this is delaying the inevitable.
Did he practice safer sex? Has he been screened, have you? Does he work with/is he still in contact with ow?
When he was with ow, what were you doing? Having fun in another way or running the home and taking care of HIS children? (Bet I can guess)
"but I don't want to hear it" that would be denial then! Does that still hold true if that "crap" involves a serious sti or a pregnancy/child?
And if "everything is fine" why post?