Children With Cystic Fibrosis

Hi,
I would like to ask a few questions if you don't mind.

My daughter is 22 months old and in Mother's Day Out. There is another Mother there that I have known casually for about 7 years. We were talking yesterday and she was upset and said that her 2 year old had just been diagnosed with CF. It was very upsetting and I was not sure how to react. Do I ask questions about CF and other problems that he has been having? Or do I just listen when she needs to talk? We live in a very small town and we seem to run into eachother a few times a week.

I do not want to seem nosey, but I do not want to be upsetting to her by not talking to her about it. I do not feel we are close enough for me to do or say anything more than I am sorry and a short hug. I think it is that I am so uncomfortable with the whole situation. I just have no idea really what CF is and how it damages the body. All I know is I think it is a breathing disorder.
As soon as I finish this post I will do a search for CF and see what I can find out there.

How do the parents of a CF baby (no matter how old) like to be treated. My heart goes out to this Mom, and I really want to be there for her, but I just don't know how to be. As I said before we have a ver casual relatinshp and it never goes any further than a "Hello & How are you".

Thanks for any help and advice.
Kim