Is it what I would choose? No.
However, from what little bit of information I have seen, she sounds like she is in very good shape for her age and is able to financially and physically support having a child at this time.
I think we are getting into very dangerous territory here. There are many women out there who may have chronic illnesses that could *potentially* limit their lifespan or cause complicaion that would make physically caring for a child to be difficult.
I have diabetes. That means that there is an increased risk of complications for me during pregnancy and birth defects for my child. It also means that I could potentially suffer complications such as amputation, blindness, kidney damage, etc. Does that mean that I (or any other woman with diabetes) should not have a child?
What about a cancer survivor who could have a relapse at any time? Or somebody with a strong history of a genetic problem in their family? Nobody wants their child to be born with an illness or condition, but I think we need to be careful about saying things like parents playing russian roulette. I knew a couple that had a child with spinal muscular atrophy. Better parents you couldn't imagine, sadly their little boy died before he was three years old. But he was a happy little boy while on Earth and such a bless in their lives. This recessive condition means that they have a 25% chance of having another child with the condition. Does that mean that they shouldn't ever have another biological child?
They took the chance, and thankfully the next child did not have SMA, but would his life have been worth any less if he did? I'm sorry, but that comment just reminded me so strongly of the days when it was considered shameful to have a child with a disability and families hid them away out of shame. It's not up to us to judge what lives are "worth" living.
As long as this mom is physically and financially capable of supporting the child now (which is all we can ask as nobody can predict the future) and has arrangements made for whatever the future might hold, as any good parent should do, then I don't think it is too old or the concern of anybody else.