my uncle passed away as well

My father called me today and told me that my mother didnt want to tell me right away because of how hard she new I would take it. My uncle which was my grandmother's son passed away 5 hours after my grandmother passed away. They told him that my grandmother had passed away and he sat down on his chair and wanted to be left alone. Five hours later he passed away. He died of natural causes but I think he died of a broken heart. My grandmother and him were very close. My uncle was in the first stages of Alzheimer's disease. He was forgetting where he was and certain names for things. He still remembered people though. This is so much for my family to take. My grandmother's sister is in very bad shape and my Aunt is devastated. I cant imagine losing a brother and a mother on the same day. My mother is taking it ok. I know my mom is the one who gets stuff done in the family. They are all Christians and I know that they both are in heaven together in the presence of our Lord.