That concept is a puzzle to me. It never even crossed my mind that it was any of my business how many, if any, children that my children were to produce. I know that had anyone stuck their nose in my personal business they would have left slightly emotionally scared.
As much as I enjoy my grandkids, they are just an extra thing that has brought some degree of joy to my life. It wasn't owed to me, nor did I think I had any say in the matter. I just don't understand what makes parents think that they should be able to pressure for grandchildren. At that point in time, it has absolutely nothing to do with them. I was in the room for my children's conception, but, after they became adults my kids were on their own.
As it turned out, we had a huge stroke of luck as, my daughters have told me that all four of my grandkids were the result of virgin birth. It's probably some sort of medical record. It happened once before, but, I was led to believe it is uncommon.