Hi Gemma and Tanya
I will echo Louise in your sis is too young for this, but in saying that there are heaps of young ones here and I am hoping that you and your sister will find support from others in similar age. I thought I was young at 36 when was diagnosed. There are currently about 3 or 4 new members in the 25 - 33 age bracket and I know that one of them is also from USA living in Australia so maybe they could catch up online??
Feel free to ask many questions. I personally had a Left mastecomy in 2007 and chose to have my other breast off and reconstruction last year. chemo sux but is doable and there is a wonderful life after all the crappy bits are out of the way.
Take care and talk to you both some more. I used to feel for my sister when I was going through chemo, she was a rock (along with my husband), i think at least going through chemo and BC you are at least in the drivers seat, where as my sister felt for me but couldnt really do much to help and she suffered badly but we are closer than ever before.
Love Tanya