I come from a big family. My eldest sister has just been diagnosed with breast cancer and she has sworn me and one of our siblings to secrecy. I have no problem with this but I am finding that her breast cancer diagnosis is making her very angry with me. I am in her eyes to blame for everything that has gone wrong in her life. While I am being sympathetic to her I am also finding it difficult to be her proverbial 'whipping boy'. We have already lost mum this year to cancer (a different form) and our sister (another different form) some years previously. Please advise me how to cope as I don't know what to do. I can't do right for doing wrong!