Good for her, she obviously loves having kids, she can afford it, and isn't burdening anyone else. Ok, so she's a older mum, and but in this day and age people are living longer and generally staying younger. 50's the new 40! Medicine has come along in leaps and bounds, and without tragedy, or serious illness, heaven forbid she'll be there for her kiddies well into their adulthood. I should imagine that it's easier to have a baby at the late time in life if you've had kids before, your body would be used to it, wheras I don't think I'd fancy going in for my first in my mid to late 40's.
In my youth, the trend was to have kids as soon as you left school, and at 23 I was beginning to feel paranoid that I'd never have kids....I was 24 when I did and felt fairly old lol! But then the trend changed and careers and or the single person living the student lifestyle took priority and people were leaving it much later. One of my close mates has just turned 36 and has just met a new fella, she's decided that if they're still together in a couple of years then they'll think about starting a family!
I don't regret having kids relatively young, as I was never career minded, nor was I particularly interested in the party/clubbing lifestyle. The only thing I would say, well about my friend anyway, she's lived her whole life so far as a young person, if she does have children, then they'll keep her young I reckon. I am just starting to feel old tbh...waiting for it all to dry up and drop off lol!