My DSD has 9 grandparents, eight living. (Two sets of natural grandparents, two sets of step grandparents, plus SFIL.) She has two Grandpas (my father and her mother's father), one Grandma (my mother), one Nanny (MIL), two Granddads (FIL and SFIL), one Nan Nan (stepdad's mother) and one Pop Pop (stepdad's father). I am only 20 years older than DSD so I could be a young grandmother. I am thinking about asking if my grandchildren could call me Mimi or Nana. To me, "Grandma" is somebody who is much older than I might be. (If DSD has her first child before 30, I would be a grandmother before I'm even 50 years old.)