You are so lucky to have duch beautiful kids, and this is such a testament to your love for them too and how your raise them. What a beautiful thing, to give live like that. I totally agree honesty is important. I would always tell my boy what i was going through so he felt secure.. he hated uncertainty and i lived a life of uncertainty... so by explaining it to him as best i knew how meant he grew up feeling secure. My sister told her kids about Dads cancer and they askef if Granddad would be okay. My bro in law honestly answered that at that time we werent sure.. and that everyone dies. The kids were sad but okay. Because the wotse thing you can do is hide the reality of life from them. Passing love to your sister too.