I am so very sorry to hear this news, this is a very painful thing to have happen, I lost my grandmother couple of years ago, we were extremely close, she was the only grandmother I ever knew, my mom's parents died before I was born and my grandfather died when I was 11, I helped to take care of her during the last few years of her life and I treasured every minute I had with her. I know how hard this is but just tell her you love her and give her the peace she needs.