Siblings with cancer

Hello al, I don't really know why I'm here but just wanted to say it out loud maybe. My brother is a year older than me and was diagnosed with prostate cancer 3/4 years ago. Over the last month he has become paralysed from the waist down. He has just been told he has only a few months to live. He is in hospital and doesn't think he'll get home anymore. He's 59. 

My sister is 54 and just been diagnosed with uterine cancer in the last month, it's spread elsewhere and she too has been told she only has a few months left. My mind is blown. I have another younger sister and my mum. We are still in shock especially with the news of my sister. I don't know how we're going to cope losing them both so close together. I don't know how to be with them both, trying to be normal but especially my sister is hard as were talking about wills and funerals and stuff. It's just so hard seeing them knowing they're going to die soon