My sil is a crazy as bitch too, I guess the apple doesnt fall far from the tree. She is as Redneck as it comes and the poor thing wears clothes that are WAY TO SMALL for her bigger body.
I have tried to be friends with her but she is so nuts too, so I gave up. The thing that drives me nuts is the hold his crazy mom has on her kids. Like my dh bro, he is almost just like my dh personality and looks wise and they were bff's growing up. But he believes everything that comes out her mouth. So my dh is astranged from his bro too... and its so fustrating.