If she is committed and nothing comes of it -- the worst that happens is they argue over it -- I gather they're doing alot of that now.

If she ISNT committed and she has something as serious as bi polar or schizophrenia -- the worst that can happen is she hurts someone or herself.

Maybe things arent as bad as your nephew is giving the impression it is ????? I sure hope he just doesnt "let it slide" because it's the easy thing to do !!

All your sister can do is try to keep up on whats going on and support your nephew. If she feels she has to step in though ---- I sure hope she will.

Keep us posted !!