I can not imagine how a 67 year old could keep up with twins. I am 31 and my 3 little ones run me ragged. As a mother, I can't understand how you could have children knowing that, most likely, you will not be there for them when they are in their twenties (if not sooner).
I'm 30 years younger than she is and haven't had my first, although I would love to before I'm 40. I don't understand it...wow. I'm not flaming, I just can't imagine being 72 years old chasing a 5 year old around...I could do it at 45, but 72...YIKES!!