My wife ,73, had hip replacement in June
He was in a rehab center 3 days later and walking with a walker through the hallways
She stayed there 2 weeks and then came home
We went for walks in the evening with her walker and out to eat
After 3 more weeks she went to a cane
That lasted about 3 more weeks then the cane was gone
So eight weeks then walking without aid but still a hitch in her stride
Now 5 months after surgery a barely noticeable hitch
Doc says 1 year for perfectly normal stride
A new procedure was used and only a 5 inch incision
And BTW...I'm also a good deal younger than your wife....so it sounds like she's either doing quite well or I'm not doing so well. ;-)