Harassment by father in law and my wife elder sister busband and wife too.

I was married 2007 to a girl from rich class after few years we bless with 2 boys by a two year gap between after cross 5 years suddenly i got one call from gulf country and he is saying you divorce your wife i would like to marry her we shocked and intimate to my father in law he intervene with my wife and settle ok but when i reached to 10 years of success marrriage suddenly my wife elder sister husband came to my bedroom when my kids was in father inlaw home and i was in office he removed her clother tried to rape but suddenly door was unlocked and seen by my elder brother kids now my father in law is harassing me to file divorce ase child custody case but i dont want to go divorce and i want to live with my wife bcause ultimately dovorce affect my both kids but my father in law harasing every month to me to leave my wife there house whenever holiday comes and he has not taken action againt my elder sister husband who ruined my happy life so now my wife and father in law giving me mental tention and im living in trouble.