I think it is great that you are being so supportive of your sister and brother in law. You remind me so much of myself about 15 years ago. My nephew was born with CF in 1991. My sister (she is younger than me-we have no other siblings) was crushed. I felt helpless. Back then we didn't have the internet connections that we have today to learn from. I threw myself into fund raiser for the CF Foundation, volunteering to help with different events. I am not saying that is what you should do, I am just saying I didn't know what else to do, and it seemed to be the right thing for me<img src="i/expressions/face-icon-small-smile.gif" border="0">
I wish I had a way to educate myself better back then regarding the disease. I did read the CF Patients and Family book, cover to cover, many times. And back then, he only saw his CF clinic once a year, so there simply wasn't a lot of information going back and forth regarding new issues. It was just different. Now, I talk with her all the time about it.
Unfortunately, I went on to have two of my own children, who both have CF. So, we have been very supportive of each other. She is a pediatric nurse now (a decision that she made when Dalton was born with CF---never had plans for that until then) and so that helps me with some technical things that I may not understand. My nephew really doesn't do well at all, and it is heartbreaking to see. My sister is very strong, and I have only seen her cry about Dalton a few times since his dx.
Just be there for her when she needs to vent. Be ready for hugs when she needs them. And if you choose, educate yourself. Even though my girls don't culture B. Cepacia, I am up to date on the info because my nephew does. I read a lot about transplants because he will probably be needing one in the somewhat near future, my girls are no where near needing that. But I like to be able to give her the positives that I learn, but still be able to understand the negatives that have her worried.
I rambled a lot. Sorry. But I do understand how you are trying to help her. Your sister is lucky to have you<img src="i/expressions/face-icon-small-smile.gif" border="0">