My mom has been having a single delusion of a group of young boys trying to harm her with electronic devices. it has become so severe over last four years that she has to close all the doors and windows, wear plasters over her body to protect herself from them. she also thinks they are trying to harm other members of family. she is otherwise very sane and with good intelligence. please help. she refuses to come to a doctor. she gets angry and outbursts on denying her delusion or speaking of a doctor