Looking for an existing story
So what I can remember of the plot is the wife busts her husband when she feels he's done wrong, he invites his brother to live with them because he has nowhere to go, she's not a big fan of the idea but doesn't immediately think it's 'wrong' but tells her husband anything wrong his brother does he's going to get busted for, the brother ends of finding out somehow and purposely does wrong so shebusts her husband (his brother). She ends up finding out and busting her husband's brother as well.
Sorry if that didn't make sense I was more or less typing as I thought so I didn't lose anything.