If she is plateaued, then take that as a good sign that the nursing home staff are caring for her properly.
The same thing happened to both my Mum and Dad, they got terminally sick at the same time but my Mum got admitted to the hospice first. She was given a week but she rebounded and passed 3 months later. Same with my Dad, he got admitted to the care centre, was given 3 weeks, but also rebounded and passed 4 months later.
Incidentally, my Dad moved into the care centre the same day as my Mum’s funeral.
I will forever be grateful to the hospice and care centre staff. Like you, I’ve heard horror stories, was deeply apprehensive and watched them like a hawk at first, but they have been nothing but angels. They became attached to both parents and became emotional themselves when they passed
one nurse came in on her day off when she was told my Dad had passed!
My partner passed two weeks ago, his story was entirely different. He chose to die at home, and that was harrowing. We didn’t live together (2 year relationship so we didn’t get to that stage), he lived alone but couldn’t get the 24 hour care, only 4 carer visits a day, and towards the last 3 weeks, overnight sitters from the local hospice - but they ended up cancelling often (short staffed), so me and one of his sons took turns to do “night shifts” to watch him, until the day carers intervened and decided to take over the nights.
He couldn’t be left alone for even 10 minutes. The pain he was in was absolutely horrendous. Any time a palliative nurse was called, we would have to wait 1-2 hours for them to arrive.
I think if my partner was at hospice, it might have bought more time, his quality of life would have been at least more comfortable, and he may have still been here, but he was adamant he was to be at home when he passed.
You made the right choice to refer your Mum to a nursing home, she will have the comfort, dignity, and 24 hour care she needs.