A couple months ago we had some friends over who have a baby a little older than Ella. When they left, Michael became hysterical, sobbing and screaming, but he was too upset to understand. After a few minutes, we could make out some words between the sobs - ELLA! sob, sob STAY! sob sob sob WITH MOMMY! And we finally could piece together that he got the babies confused and thought they took Ella. It melted my heart.