How to tell older siblings.

Jessica

I have two wonderful girls, 13 and 10.5, and cannot think of a way to tell them that they are getting a sibling. This is definitely not something they are expecting. I have no idea how they will react and want to give them space to feel however they feel about it. Most of the ideas I’ve seen, while cute, are definitely aimed at younger children. I’d love to do something fun but want to be sensitive to the shock and feelings they may experience. Any ideas?