Imagine the following scenario - You are the son of an aging mother, who has begun to experience signs of dementia.  You and your brother both believe it is time for your mother to give up control over her own finances and want to talk with your sister about obtaining a conservatorship for your mother.  Your sister is reticent to pursue that course.  You believe that is because your mother has been very generous with your sister, giving your sister many cash gifts.  Your sister believes your mother is still able to manage herself, and also believes that you and your brother are trying to control your mother.  You are concerned about your mother...