My uncle who shares a house with my Mother and I. He has been suffering with dementia for the past 4 years. He will undergo medical assessments on a certain date soon. He is always shouting at and fighting with my Mother everyday. And now she is feeling destroyed with it. This happens every early afternoon at tea time. And he is aggressive with me also. My uncle's behaviour is now becoming worse. What should I do about it when this keeps on happening?