I empathize with the suffering your family, and your sister in particular, must be going through.
From personal experience of seeing miraculous effects a Chinese herb - Tian Xian - on a 78 year old man with lever cancer, who was given 6-10 weeks by the "cancer experts", I would suggest you to visit the following site:
The old man mentioned above was almost bed-ridden for 2 years before the dooms day prediction by the "expert doctors". His son, my friend, was bold enough to read through the above site and order the medicine immediately by Fed Ex courier service.
Results: After 3 months all medical tests were almost normal for the person of that age - Doctors surprised of course. But this is not the point.
After another 2 months the "Old Man" became bold enough to tour some distance places, that he had planned long ago but could not go because he was on bed, with his wife.
He was a man without any symptoms of cancer and regained his earlier cheerful self. About 6 months later he died a normal death - not as a victim of cancer.
At the above site you will find testimonials from all types of farmer cancer patients who should have died long ago as per the "experts" and "doctors" but are leading a normal healthy life.
I am sharing this info only out of goodwill and compassion.
DISCLAIMER: I have no idea how this herb works nor do I have any financial interest in promoting this herb. Please use your own judgment and do your own research.