Mom thinks she is just in a place for "long rehab"

I have a spunky 87 yr old mom who loved to dance at a senior disco on Sunday and was so young at heart it was contagious. September she had rectal cancer surgery with a follow up surgery in November. As she is no spring chicken she has gotten weaker even with being in a nursing/rehab center and getting pneumonia followed by another trip to the hospital for a UTI. E Coli dehydration and septicemia. Her will to get better is so strong but nobody is beyond age and a failing body catching up with them. An only
Child too and saw my poor mom suffer with bi polar growing up but she always seemed to persevere she wants to go home and I so wish
She could but I know her stay at the nursing:rehab center could turn out to be full time. It breaks my heart to see her ask me each day when I
Go to her "when will this go away?" "When will I feel better" I
Cannot tell her that they found possible metastasis to the liver. I tell her that she
Is just in a "long rehab center" and she will feel
Better and better if
She eats and rests and
I even tell her that I will even go dancing with her when she gets out. It's never enough time with our parent no matter what age. So if I tell "a little white
Lie" I hope not doing the wrong thing 😔