That's the tragedy of kids being born late/ waiting to have kids that few people think of. You deprive your grandchildren.
If you have a kid at 25 and your kid at 25 then you will be a 50 year old grandparent, which is still youthful enough to help your kids and be an active member in your grand kids lives.
If you have a kid at 35 and your kid at 35 then you will be a 70 year old grandparent, which is usually too old to be much help to your kids and be active with your grandkids and unfortunately you will likely die before your grandkids grow up and they won't remember much of you.
Interesting point, which not too many people think about.
This woman, single mom at 40, will be 50 when her boys are 10, and 60 when they are 20. If they delay marriage and/or don’t have children till their mid 30s or later, she may not even live long enough to be a grandmother at all.
We have 7 grandchildren ages 7-16. We just came back from a cruise with an 8 year old and 10 year old followed up by a trip to Atlantis with a 12 year old and 9 year old. We’re both in our 70’s and frankly they help keep us young. Grandparents are different today from a generation ago. At 60, my grandmothers looked like they were in their 80’s