When the husband got bothered by them, he understood that they were a nuisance. But instead of telling them, he took it out on his wife and threatens to divorce her. Well take him up on his offer, contact a divorce lawyer and start the proceedings and tell him that you are doing that. He can then deal with his parents to his heart's content. Threatening someone with divorce without cause means they dont care about you, just themselves.
Yeah I’m getting very into calling people’s bluff, they’re practically begging for it with these ridiculous ultimatums. Divorce? Cool sign me up, what do you want to do about the house?
A friend of mine was married and miserable. One day, during a fight, his wife told him that she would be better off kicking him out and going on welfare. He packed his things and moved out. Turns out she was wrong. He’s a lot happier now.