When I got my big sister, she gave me (and my twin) a picture of all of the sisters surrounding the two of us. When I found out who my big was, I realized that in the picture, it was her, the two of us, and her little sister from the year before, surrounded by our loving chapter. She had had the picture taken without us even realizing what was going on. We thought it was a clue that the two of us were twins!
Good luck!
LIOB,
SARA