*sigh* Whilst my mother came from a large family (the youngest of thirteen children), I've not really had that many extended family members very close to me. I always got along so well with one cousin in particular, Claudia.. quite a few happy childhood memories. Sure, her English was relatively simple, and my German much worse, but that hardly mattered. ^_^ About nine years ago, she was diagnosed with breast cancer. Her mother died of it five years ago.. I'm not sure if there's really a good way to go, but that's emphatically not amongst them.
She was given all the treatment they could offer, and it seemed to have been beaten into remission. Then, in 2004, we learned that it seemed to be making a comeback. They tried again, but, there's only so much medical science can offer, especially after having already endured a range of treatments.
I suppose I'd been fooling myself, hoping against reason that she could make it. But maybe that's all we can do - hope for the best, rather than accepting a grim probability from the outset. (And after all, it was hardly me that had to keep a positive outlook)
All I can add, I suppose, is to suggest setting up a regular donation to a good cancer-related charity. A one-time donation's a very good idea indeed, but even better is something they know they'll be seeing every month, even if that's as small as £5 or $10. Amongst others, the UK's AICR is one you might consider.