I absolutely cannot understand how any family member can totally cut someone off like that - it's disgusting.
My brother DA'd himself years ago when I was still a good little dub, and I never, ever shunned him. I treated him the way I always had and so did my parents. Although we never discussed it, I think we all felt like "screw them, no one's going to tell me I can't speak to my own flesh and blood."
Amazingly, we never got in trouble for it either.
Lovedubs, I'd really like to know what SCRIPTURAL grounds your father-in-law had for leaving his wife. Unless she committed adultery, he had no scriptural grounds and he should have been PR'd for not "following orders."
Assholes.