I have a sister , she is acting very strangely , she was always a brilliant student , a sharp person , good in studies , good in sports , good in everything , She completed her Doctor degree , then she went to our Village , she had a fight there with her Elder brother , and ever since returning from village she is acting kind of very strange , Like , She is alone all the time does not talk to anyone , and NOWADAYS she says her parents are not real ,, She just sits on the Roof alone all the day and night , she just comes down to sleep , she even eats her food at the Roof , She fights with siblings , she breaks things in the house , she has left namaz and Quran . , even if its very cold nowadays she just sits on the Roof in the cold and she does not even get Ill , Is it mental illness or is it Jinn Possession or Magic ? coz its very cold nowadays and she just sits on the roof in cold without getting Ill , She does not go to mental doctor when we mention it to her she breaks things , so we contacted an Exorcist , he said that she is not possessed by Jinn but is mentally ill , , So what should we do ? should we do exorcism or should we go to doctor ?? PLEASE HELP We are very depressed recently due to this problem