I really have no suggestions for assistance for your family members, other than this site which can be a HUGE emotional support. I just wanted to tell you that the kids are lucky to have an aunt like you, and I'm sure that their parents are doing more than humanly possible for them.
I will keep the whole family in my prayers, especially little Emily. Please tell her parents that they could not have chosen a better name for her. You see, in my experience, the name Emily and cf combine to create POWERHOUSES of energy, determination, stubborness, smarts, and a HUGE will to win any fight. My own sweet/sassy 22 month old is living proof, and there are a few other fine examples on this site, too (Emily65Roses, Letsrockcfem, LovingBenandcambree).
I wouldn't be at all suprised if your little Emily beats all odds. Please continue to visit us and keep us updated. We want to know how the whole family is doing. I can not imagine having 4 kids that young, let alone with cf. You'll all be close to my heart.