How old will you be when you become a grandparent, if your kids have kids the same age you did?
I will be 42 when my oldest is 20, 45 when my next is 20, 47 when my third is 20 and 49 when my youngest is 20.
If my oldest has kids the same age I did I will be a gandmother at 44, if that child has kids the same age my dd and I did, I will be a great grandma at 66 and a great great grandma at 88. If everyone has a baby at 22 yrs of age :).
If all 4 of my kids have 2 kids each, I will have 8 grand kids. And If they all have two kids each I'll have 16 greats and potentially 32 great great grandkids. This blows my mind!