I have a crazy sister

My family has a problem; and she is called Mary (Patty ). She is one of my older sisters. She is 12 years older than I. She was always very motherly to me and my other 7 brothers and sisters. And she has become a nightmare. She has a problem with our spouses. And she has a problem with her own boys spouses. None of the spouses are any good. She is a drama queen to the max. She creates in her head horrible things that she thinks are going on. And she trashes everyone.
Do all familys has a relative that pulls this crap ? She is pushing the family away ; and it is sad. Because we are all tired of her bull. Mary Mary Mary where is your head at ?