My father is 93 years old. He does not have a relationship with his younger sibling and has not had any contact with her or her family in over 50 years. He is the middle child of 7 children. Due to circumstances out of his control their family had been separated when they were young. He has slight dementia and his health is declining. He's frequently sad and states he wants to die. He always mentions that he feels guilty that he has lived so long when his other siblings have passed away. He has one younger sibling alive. It was decided by a distant relative in the other country and myself that we would hold back this information because of concern for his mental health and well-being. I am now having second thoughts whether or not this was the right decision. Should he be told and for what purpose?