My mother in law passed away in a nursing home, while she was there she was visited by my wife. She passed away and was cremated 6 days later. My brother who had power of attorney didn’t tell other family members that she died and family members only found out later when they went to the nursing home to visit. Her husband And her children were devastated. Is there any action we can take. He will not give a reason for not telling us about her death.