As someone who brought the first child home at 36 and the last one home at 45, have babies early and often. I can assure you that a 15 year old at age 60 is a different kind of torture!
Are you me in another dimension? Exactly! I thought I was the only one in this position. I married a younger woman and expected her to be with me rearing a young one. She died. Now I have a 15 year old out of control hormone addled teenager.