"God, teenage years," he breathes with something like an awed sort of laugh. Right now he can barely imagine how much their lives will change when the baby arrives in two months, but the very idea of the years that stretch ahead seems almost impossible. "It's not just a baby, I'm getting a little human."

Someone whose personality he's going to watch grow and change. Someone who will grow, someone who will learn from him and Spencer both. It's astounding.