WOW!
Thank God He put Miss Sarah in your family, huh!?!
Don't worry about how long you will have to live. Just live until you die and that will give brother and niece more strength and encouragement than you will ever know.
Have you gotten in touch with the Shriners for help for Miss Sarah?
I suppose I am asking too many questions, but the Shriners LIVE to help children with her type of disability/birth injury - - if I remember correctly.
Think back through your life and all of the early memories you have ... and, how many of them live in your heart today - - and you will understand how important you are to your special niece TODAY ... not, fifteen years from now.