Haha! Very interesting life goal - When your dependents have sucked all the life out of you, you can kick the bucket:) (And am sure it’s worth it)
Don't laugh, there's a reason for it. Read the book "The Red Queen" which explains all this.
> when my youngest will be 21, then I can die. ;-)
which I thought was a funny way to put.
But, am sure there is an evolutionary reason for dying after your children leave the nest. It's all good:)