Folie à deux by Proxy in a Father, after Physical Abuse by a Mentally Ill Daughter

This is the first case report in a country predominated by Chinese that describes the physical abuse of a recipient by the inducer in shared delusional disorder. The report describes a 42-year-old patient who physically abused her father until he submitted to her delusions. Subsequently and for years, both sustained persecutory delusions against their neighbours. While the patient was undergoing treatment, the father continued reinforcing her delusions. There is a need to explore the possibility of any forms of abuse of the recipient by the inducer in shared psychotic disorder. This report discusses the development of such delusions in a specific case and makes recommendations for the management of similar cases.