another poor family

One of my co-workers whose name is Chris, lost a brother to a heart attack 14 years ago. His name was Jimmy. He was 32 & died in his sleep.  When my son passed at 37 from a heart attack Chris's mother Jean called me & was very kind to me. She gave me hope & told me that someday I would breathe again. Well, yesterday, Chris's other brother, Jean's other son, died in his sleep from a heart attack. He was 49.
How can life be so cruel that 2 sons are taken? I know there are a couple of mom's on this site that have lost more than one child. It is heartbreaking.
Please pray for this family. Thank you.