I think back to when I was pregnant with Elsa. Arlo was not yet two, and I felt guilty: Was I taking away his babyhood? Depriving him of alone time with his daddy and me? My fears were put to rest the first day Elsa and I came home from the hospital. It may have been sloppy at first, but we figured out how to be a daytime team of three. And now, when I catch them playing or reading together or just being buds, I melt. The fear of change has given way to the joy of discovering sibling connectedness.