T.C.
How sweet. I would use this opportunity to share with her that this is one of the important steps to becoming a woman. Our bodies go through lots of changes as we get older, and this is one of them. She's getting to be such a big girl! {with my boys, I give them examples, like they will start to grow hair (see how Daddy has to shave everyday?)} This seems to make them excited about the changes their bodies go through. As she gets older, you will add to that list as needed.