I have one friend who stole another woman's husband 30 years ago, and they went on to have two more children and are still married. He's a doctor and never ran out of money. Maybe he has other affairs, and she expected them. I haven't heard rumors to that effect. But, now in his 70s, he may have ED like so many older men and can't have an affair anyway. Either way, that is the only affair couple I know of who stayed together. What you say is golden... They got rid of an unfaithful, unreliable family member.
With no integrity.
His ex moved away, but I hope she found a gem of a man who appreciated her.