With age for some people certain psychological disturbances gets exacerbated. Your aged mother might be affected by psychotic symptoms, which includes delusions, hallucinations, paranoia, behavioural issues. She would have these as her predisposition in her earlier years too. It requires help in terms of psycho education to family and treatment and medication to the patient.
Next Steps
kindly seek medical help.
Health Tips
Do not feel guilty, blame oneself or others for this condition.