Our next door neighbors and dear friends are just a bit older than Marilyn and I. So are their kids. (a bit older than ours)
They have three children. All married. I believe all in their thirties. One son and two daughters. If you would have asked me one week ago I would have said they have three grandchildren. Well one of the girls gave birth to twins last week, (a boy and a girl) and their son and his wife gave birth yesterday to a little boy, and the other daughter is pregnant with twins to arrive before Christmas. In the parlance of a cow/calf operator, " three on the ground and two more to go".
Yep, from three Grandkids to eight in less than a year. Yep, Grandpa's a twin.