Margaret Martin at melioguide.com is a great resource on safe exercise for those with osteoporosis ( and fractures, though your spouse's mild, so serves as a good warning maybe!(. Martin has masterclasses, videos, and a book which I have on my bedside table!

A good PT can help with safe ways to move, though I have not found many who know about osteoporosis. I did find one and stuck with her.

I have found tai chi helpful for balance, strength, calmness and posture.