This very funny at times. The cheating husband is out to rob the wife's money by any means. He moves mistress near by.
Wife uses a briefcase with spyware to keep an eye on husband and get proof so she can divorce him. But she decides to make his life a living hell before she ditches him. When he lathers up in the shower she turns off water and locks him in a towel in the hallway. The wife is smart and is able to keep up with the totally amoral husband. Better than I expected. Different?
Yes it is. But something satisfying watching a nasty cheater get what he deserves. Complete with pushy in laws.