Each individual is different in how they respond to information. For some (like me) who are analytical and think if they KNOW what might come, they'll be fine, all the data is good. For others (like Dad--the actual patient) it just scared the beejesus out of him. Between the two of us, however, we got the job done. Offer info, question & listen to the docs, respect that it's your sister's battle and help her fight it in her way. Your support means the world to her. Hang in there. Caregiving is tough work, but very rewarding. Your sis is lucky to have you.