What would you think of your mother posing for playboy?
Then [the 1960s], or now? She'll be 60 next year. My mom has a youthful appearance/attitude and attracts men 20-30 years younger than her. I wouldn't have a problem with it. She's a high school music teacher, though -- not in the Air Force.
Personally, it would mean my mom had lost a lot of weight and I would be very happy for her.
I think the human body is the most beautiful thing in the world. I don't see any reason at all to be ashamed of it. I have myself posed nude for photographers (once outdoors with spectators) and art students. Nothing at all wrong with it and I'm not ashamed at all. I wouldn't be ashamed if my mother did it or any other members of my family.
Why would I be?