Hello V, I'm so sorry to read that your Mum isn't well (((((big hugs to you))))
It is good that she is out of intensive care, and yes it will give your Dad a little break. My Dad is also full time career for my Mum who has dementia. They are in their early 80s and their 60th will be coming up in a couple of years.
I understand what you are saying about the losses. I find that hard too - that I may lose my XH and possibly my Mum too in a shortish space of time. But I think the main thing is to cherish the time we do have, and do our best to be there for them in these difficult times.
Take care V, and I hope your Mum's health improves xx
T 13 M 7 Me 48 H 46 SS 15 BD 7.14 PA D final 5.16 (H filed)
We receive & we lose, and must try to achieve gratitude & embrace with whole hearts whatever of life that remains after the losses - Dubus