T.R.
K., you are wonderful for being such a great Aunt and Big Sis. I was told I would never have children and when I got pregnant with my son it was a miracle from God himself. He was a very sick baby but now is a strong 2 1/2 yr old, if not a bit of a handful!! My pediatrician told me once that Mommy's always know. There is that rare case of overprotective syndrome, but if you (or your sister) is worried go to the doctor. If they don't listen find another one! I have learned that the hard way. If your mommy sense is tingling, listen to it. I have several relatives that work with kids in day care, they see babies everyday and very rarely express their concerns. But when they do it is because they see something very irregular. I am sure everything is fine, but have also erred on the side of being safe than sorry. Take care and good luck!
T. R.