Broken ribs are no fun. I had broken ribs when I was in my twenties. It's probably way tougher on a senior citizen. Bones are a little more brittle at that age.
And their bodies, specifically their immune systems, are not working very efficiently.
My mother-in-law started with an accidental fall that broke her hip, and then it was like a cascade of dominos faling. A year later, she passed away, despite everything we could do for her.
I actually do hope that's not the case here, because I would never wish death on someone (except perhaps a murderer on death row), but I wouldn't be surprised if this went badly.