Tom, I don't have any sage advice. I just wanted you to know that you are not alone. Were I in your shoes, I would be hard pressed not to put this asshole in the hospital myself, distance be damned.
Just curious though, what is your wife's take on this? Since it's her sister, she should take the lead in dealing with it and you should support whatever she decides to do.
is now Captain Stoned
You are too straight to be a floral designer. - da Bunny
RIP Dad Apr 22, 1942 - Dec 2, 2011