Best of luck to you both. Hopefully a few weeks of turnout while you both finish healing will help her learn that her legs don't hurt any more, and that'll improve her attitude. Was the joint injection the same thing they do to people with synovial fluid problems in their knees? If so, it's really good (had a fencing instructor with the occupation-hazard knees, and it had him back teaching again after being on crutches before).