I read this article about lawyers who continue to work late into life.
My 78-year-old mother is a practicing lawyer and people can’t believe she continues to practice at her age. Her advice, that I live by, is that when you find something you love doing, you should keep doing it as long as you can.
As an exercise:
Take a moment to imagine what your life will be like when you’re 90-years-old. Where will you be living? Will you still be working? How do you spend your day?
Now answer the same questions for your character.
Even if we never see your character at age 90, it’s always important to consider their life when you are telling their story.