My heart goes out to you and your sister. I have been in the same situation for the past year with my beloved brother Jaime. I am so glad that you will be able to be with your sister at this time. I was not so lucky, when it came to the end I was not informed/contacted in time to make it to his side. I will always treasure every moment I did have with him though.
I will be thinking of you both and wishing you strength and peace. :-: