We moved to NC from NY in 1997. All was wonderful. My mother in law moved here a few years later, all was fine. Then a few years after that my sister in law and family moved here. We never got along with each other in NY, then she has the balls to move on the same street as me!!! I was in shock. One of the reasons I moved from NY was to get away from her. Things have gone down hill ever since. 
She is very over bearing, has to control everything, my husband has no balls when it comes to his family so then I am the one being the bitch and yelling at them all when they try to take over my house and our lives. I actually had to throw them out when after a year they wouldn't dicipline their son and I just couldn't take it anymore. They are Italians and know NO boundries. 
Then the mother got mad at me because she would never not side with her daughter. The mother soon after that told my husband to divorce me. He was in shock but still loves them very much. Since that time I have banned my sister in law from my house because of other things she has done. I sent her an email telling her I would have her arrested if she comes on my property again. 
My husband visits his mom and sister at their homes, I have nothing to do with either of them.  
I will never trust my mother in law again, after her telling my husband to divorce me. I wish they would all just pack up and go back to NY or anywhere but here. Almost all the arguments my husband and I have had have been about his rotten family. We have been married 22 years and have 3 children together. 2 out of the 3 of the kids have nothing to do with his family either, the are grown and can see all the games they play. I have the inlaws from hell. Is there any help?