Welcome to Cancer Chat alltough I am sorry to read about your sister. There are lots of very brave people on this forum who have shown great corouge and even when things have looked very bleak, have still fought on and are still with us.
I myself was very lucky in that my wife made me go to my GP where to my surprise it was eventually found I had prostate cancer but thanks to my wife was caught early and I have made a good recovery.
It must be very hard for you seeing someone you love suffer from this cruel disease. All I would advise is to try and make as many happy memories as you can.
