Mom has Alz/Dementia and heart condition, osteoporosis and is depressed. She is very stubborn in her own way. Dad has probably numerous undiagnosed conditions, both psychological and physical. His mental capacity is diminishing in many ways but is incredibly agrumentatitve and difficult. He claims to understand her condition but continues to scold her because she can't prepare meals anymore and insists she is doing it on purpose. They have had a toxic relationship for years, even before the dementia and decline.