Theres a big difference between a mother and a father having a kid really late in life though, being that the male doesn't have to carry the child..which in itself could bring huge complications especially with her age. Also traditionally (I know not always) the woman tends to have a more active role in the childrens life too, especially when they are babies. Along with that this woman seems to be 'going it alone' so to speak, which theres not a problem with BUT, this is what makes it different from an older guy having a kid with a younger mum. Nature tells us women to stop..and its for a reason. Yes some people have the menopause early, or can never naturally have kids. But generally, a woman can naturally have children til shes about 50 ish. Men never stop being able to (again generally)
Also personally I find it rather selfish for 70 year old blokes and such to keep fathering kids

But I see a big difference between a 65 year old bloke getting someone pregnant, and a 65 year old woman being inseminated to be pregnant and have a child. Just enjoy being a grandmother, or adopt ffs