If my mother was still alive -- she died of cancer in 1992 -- she would be 79 years old today. Sadly, she didn't even make 60.
We all imagine we will grow old with our parents. It can be a shock to the system when a parent dies young. But that's the way this life is -- you never know when your number is up!
My dad is still kicking around at 79, though he has some health issues that need immediate attention. One day he too will be gone...so will I, for that matter.