I'm with Nakaru on this, in as much as it's very hard to know what to say in situations like this. However, I want you to know Admi that you and your beautiful redhead are in our thoughts constantly and we all hope and pray for her to make a full recovery in time. It will be a difficult journey but in a very real sense, it is not one that you must face alone. I'm sure that I speak for everybody here when I say that we will all support you as much as we possibly can in whatever ways are possible.
As a woman, I know that the thought of losing one or both breasts is totally horrifying, but at the same time, I also know that it doesn't change the woman inside, and it's important that you let her know this, because her first thoughts will be that she will not feel like a complete woman anymore, but you will need to make sure that she understands that you still see her as the same beautiful redhead that she always has been. It will be tough because on her worst days she will begin to doubt everything, but with your help and support, you will both get through this.
Sorry if I'm rambling a bit here - it's very difficult to find the right words...
Wishing you all the best Admi