Update:
It's been just six weeks and things have been going extremely well. I've spent a couple of those weeks with her and know where I'm lucky, the caregivers queue up to be the one who gets her, she really is one of the sweetest little old ladies you'd ever meet. I know it's common for folks to turn mean or difficult but she is really good about being grateful and finding things to be positive about (once I've reminded her a few times

).
So rehab has been going well we got rid of the wheelchair about 10 days ago for anything other than off-site transport and the sling came off two days ago. She walks around with nothing but a cane and a somewhat hovering nurse through the house, rehab group home actually, and it has really helped with her spirits and feeling some sense of control returning. I figure within a month or so we can start talking about how she wants to go forward, either in her apartment with more added assistance, or some other options if she wants.
When she saw the surgeon and got the go ahead to ditch the sling and start occupational therapy for the shoulder he noticed a small anomaly along the incision line and removed the questionable tissue with instructions for wound care twice a day to be performed by her private nurse and added some antibiotics as an abundance of caution.
Just got a call from the lab, yep, it's MRSA. Fuck.