I just had to chime in and comment on the MIL part!
When my son, now 17months, was diagnosed 10 months ago, obviously both myself and my husband are carriers. There was no knowledge of cf or cf carrier status on either side. However, my MIL's comment when she found out was that the gene absolutely NEVER came from her.....it must have been from my husband's father. (Who has passed away and was not part of their lives for 30 years). She said she KNOWS it is NOT from her! How can someone possibly know that? I was so irritated by that, plus she put "blame" on her ex for passing this on! Well..that just also means that WE as his parents are to blame! Not so, we had no idea! Anyhow, the dna has revealed one common mutation and one undetected. (In the works to find out which one) we were carrier tested, and I have the common (df508) mutation, and husband's is undetected. Anyhow, MIL had carrier testing done and of course it was negative, as even if it IS from her, it would not have been picked up on the basic panel, as the mutation from my husband's side is NOT found on the basic panel. She needs to retest when we know what one to look for. However, she doesn't understand that! Denial! She just says her carrier panel is negative and that's that! So frustrating! She doesn't care to learn about CF. I am sure it is denial! Just so frustrating! It is NOBODY'S fault!
Ugh! Sorry, that turned into my own little vent, LOL!
Angie