82 years. I'm not sure I'd want to live that long, but I guess it's okay.
I have a grandfather who is 92 and can't take care of himself because his mind is going, not to mention he is feeble. Also, in that 92 years he has not gained any wisdom, and still tries to control people with money, and subsequently, alienates them. I have a great aunt who is 93 and can't live on her own, either. Her mind is fine, apparently, but she's a nasty, hateful person, and from what I've been told, she has been that way for the entirety of her life. It's like her one goal in life is to make others miserable. These relatives are from 2 different sides of the family. Fortunately, I'm not actually related to my great aunt by blood, just by law.
I didn't like the question about parents' ages, though. For my parents to have been at least 80, they would have had to have me when they were 56.