Dear Pied,
I think what Kassy did was wonderful. Nothing matters at this stage but comfort and peace. I don't know how they knew, but the staff at mum's NH stopped changing mum's nightie a couple of days before she died. It was probably similar to your mum, in that they expected her to go earlier than she did. If your mum isn't sweating, and is hardly passing any urine, changing her clothes won't be as important any more. I think I would just want to be left alone, if it was me lying there.
If at any point, you don't feel right about decisions made by the staff, no matter how wonderful they are (and they are) please use your voice and speak for your mum, using only your natural instinct as your guide. As with childbirth, there is no instruction manual on how things pan out, and it's no different at the end of life. In labour, if I couldn't speak, my husband would speak for me, instinctively knowing what I would want, and if I didn't want to be touched, he said so. This will be similar, and if a little voice inside says your mum wouldn't want something, then you will step in. Sorry to go on about this. I know that's not what you were posting about, but it brought back the memories of feeling helpless when the world was upside down. With no experience to build on, I was led by others, and I'm not sure now they were always the right thing. I've always said no regrets, but if I was unlucky enough to have my time over, then these would be the little things I would change. A bit like when the staff would continue trying food with mum, when my instinct said not to force it, I had the same instinct about touching and moving mum in her final days. The bed was keeping her moving, so they stopped turning, and I was happy with that. Sometimes, it's the lesser of the two evils, and things like changing clothes is terribly disruptive, yet not doing it might make her uncomfortable. I may be missing the point of it, but my basic view was that mum wouldn't mind. Rather the same nightie, than the pain of being moved.
Sorry, sorry, sorry. I shouldn't have babbled on like that. It just struck a chord, I think.
Hoping your mum can be left, in privacy with her daughters for a while now,
xxxxx