Monsters in law

Every single member of my husbands family has tried to get him to leave me because I don’t get along with his sister. They’ve attacked my integrity, told him I’m trying to get pregnant behind his back so he won’t leave me, keep in mind we already have two children together! His family is blocked and deleted on all of my social media and they’ve made fake account to look at what I’m posting and show him and tell him that I’m trying keep him away from them! I don’t post anything about them because I really couldn’t care less about them. But honestly my limit has been reached! I’m about to loose my shit you guys!