My Sister Had Chemo For Cancer, She Has 25% Of

my sister had chemo for cancer, she has 25% of her liver functioning, and has bowl cancer as well also spreading to lung she has been told pallative chemo also has a stroma bag in the chemo was stopped 13 weeks ago and she has been told the cancer is back, can she survive much longer like this she is 50 yrs old and getting morphine for pain can this weaken her heart