BMR, I’m sure your situation brings back a lot of memories for others who’ve been there mate (as it does me), so know just what an awful thing it is you’re all going through, it’s fuckin heartbreaking, especially watching someone who you remember being so strong, so capable.
Just remember she’s where she wants to be, surrounded by the people she wants to be surrounded by, only advice I would offer, and I say this from personal experience, no matter how far out of it she may seem, still talk to her, hold her hand, hug her, kiss her, tell her how much you love her, because as I say from personal experience, she’ll likely be aware still, if you do all this already, keep doing it and don’t stop.
Best wishes mate.