I’m so sorry to hear that @bluehawk
My wife was undergoing chemo while pregnant with our second child and I spent every moment I could at home looking after her and eventually the baby when she was too ill to.
Like Otter mentioned I found myself reading lots and listening to music, so I could be with them even if they were sleeping or dozing. I had lots of graphic novels to read also. Though my wife was often way to sick to eat I used to cook a lot so that she would have food when she felt up to it and I could pass it around our friends and family when I had too much. I also tried to make a schedule even if not particularly regimented to avoid just sitting and passively browsing online of otherwise just “existing”. This also helped me when it came to sleeping.
Aside from that I just tried doing all I could “together”, drawing and painting, playing with modelling clay and trying to make sure everyone felt like a family. Those little bead things you place on a spikey board then iron together is a great way to make pixel art together.
Well done for being there for your family, With love, sincerely, C.