neither my husband's family (he has CF) nor my family have any cases of CF, so this is purely my opinion based on hearing other situations of CFers in extended families and close in age, and just my thoughts in general.
You and your spouse, and the other parents (brother, sister...) need to sit and discuss what is most important to you at this point. I personally feel that it would be important for these cousins to have a realationship. No CFer is ever going to be able to completely avoid all other CFers. Granted, some CFers never get to personally meet another person with CF. My personal stance on that is that it is a tragedy. Of course, people do have their opinions about "cross contamination" and want to stay healthy and safe, and that is a personal thing. But I don't necessairly agree with that, and if I had CF, that is now how I would live-but again, that is personal.
Just the other weekend my husband and I did the CF walk where he met a little 8 year old guy with CF. The little boy was like, "wow, you have CF. You are so big, that's so cool". and my husband told him, "I stay big by eating right, when my mom and dad told me I needed to eat and what to eat, and even though sometimes I don't like to, I always do my medications to keep my lungs healthy so I can go to the gym and get muscles...." This was probably more beneficial to my husband, (to be viewed as a roll model) than it might have been for the little guy he met. We are keeping in touch with the family and plan to do some activities this summer. Mark feels that he never knows when his time is going to be up (or mine, or this other little guys' for any matter) so he might as well enjoy as much as he can. He has always been very health conscious, (had a rebellious teen stage though) but he feels that the QUALITY of his life ad all the activities he does and all the people he meets; is going to be more important in the end than the QUANTITY of years he <font color=white style="background-color: 3E3E3E;">might</font ft> have lived if he "isolated" himself. -I hope that makes sense.
You can always decide to have contact now, and set some strict guidelines about when someone is "sick" with a flu or a new bug, and then let your children decide for themselves when they get older. Chances are, they are going to be grateful to you for the decision that you made and will probably stay very close. They will have grown up together, both having CF, both eventually understading the in's and out's of the disease, they will have someone to talk to who understands about the coughing, and the eating, and the bloating-somone to talk to and confide in when they feel like nobody else will understand because nobody else "has" what they have.
Speaking from a third party of stories I heard from my husbands mother (and other CFers past their teen years and parent's of teen CFers), his teen years were incredibly difficult. He had some of the general teen issues, and has always been a sweet guy (as his mom tells me all the time) but he became a bit rebellious, didn't want to do his meds, wanted to be normal.... She feels, as well as he does, that if he had a friend/buddy/penpal/local aquaintence with CF; that it might have eased the burden of dealing with the disease throughout his teen years. Maybe these cousins can be that for eachother.
In the end, it is going to be a very personal family choice, but those are just some things to keep in mind as you and your spouse discuss it, and the other parents discuss it as well.
Take care,
Julie (wife to Mark 24 w/CF)