I'd picture she was about 20-24. If the pictures were as far back as in the 1960s, it's possible.
But if it was in the 1970s or 1980s, she'd probably be 55-70 today
Here's some more.
The Mature Woman in the nighttime pic would definitely be old today if she's still alive.
Another thing to keep in mind is that a lot of naturists probably continue a lot of that lifestyle for decades once they start.
So the "grandma" you mentioned could be at some campgrounds and resorts somewhere letting it all hang out.
Indeed.
I actually found the videos too where she's from and I have an excerpt I can share right here for those that want to see it. She's a beauty queen to me.