It might not even turn up in a normal scan, but there's another blood type, a difference in my genetic make-up. It's what we, in my line of work, call an Abnormality. Mine happens to be longevity. For all intents and purposes, I am entirely human, but if anything should happen to me... I felt you should know.
[ it isn't something she tells just anyone. it's a mark of trust. hopefully this won't end badly for either of them. ]