Contact the closest Susan G Kommen Foundation center you can find. ASAP. Ask her and her family to speak with them. They can really help. You can get honest answers. Doctors are usually fair and honest, but they are also clinical. At SGK, you can talk to hundreds of women who have been through it and also helped hundred and thousands more. You will get real world advice from them beside medical information. Things like: treatments and thier effects, useful changes in diet to help get through treatments, useful lifestyle changes to accomodate treatment, useful exercises to help maintain the body through treatment (often very very basic things for those undergoing heavy chemo) and help maintain the mind (probably the most important thing). They can discuss how chemo and therapy can effect relationships, sexual, familial and others. Common psychological reactions and emotional responses and how to deal with them. And maybe most important, an outside support group she can talk honestly with, without fearing about the feelings and/or relationship she has with them. It can be hard for anyone going through this to face their own fears, doubts, and worries without having to deal with the emotions, fears, doubts, and worries of loved ones and the unspoken thoughts she will see in their faces.
My sister in law beat breast cancer and got a double mastectomy, went through chemo, and then had 2 beautiful children. Before any of that happened her first child died of S.I.D.S. She and my brother managed to get through all of that. I am sure she will be more than happy to correspond with your friend. She also runs an annual Susan G Komen fundraiser and is active within it. PM me of you want to know more.