I am very sorry to hear this, M.Helen

There is an alternative method called 'Cellular Healing' that I know has been used to tackle cancer - of course, it may not work (so please be cautious and realistic), but some people have found it helpful.
The idea is that a disease, such as cancer, may have it roots in other physical or psychological health. For example, if the patient is very unhappy or has been traumatised in the past, but never expresses their feelings, their feelings may manifest as a physical disease. There is a book called 'The Journey' by Brandon Bays, which my sister used in the past, and I believe the technique originates from the work of Deepak Chopra. The technique uses meditation to heal the body and isolate any other issues that may have contributed to the disease.
http://www.meditationsociety.com/week29.htmlEven if this does not cure your friend's mother, she may find meditation relaxing .
You could also check this website for Penny Brohn Cancer Care. This is a reputable centre in the UK who provide information on complementary therapies and nutrition. A good diet and positive attitude can help a patient cope with chemotherapy, and improve quality of life.
http://www.pennybrohncancercare.org/page3.asp