"It's really complicated." Sirius didn't want to overwhelm the boy with sadness. One thing after the other. However... "You met the werewolf. His name is Remus. Remus Lupin." Which was a bit odd, all things considered, but Sirius figured that the Black Dogstar couldn't exactly talk. "He was there when you were born too. And he held you and he told you stories. He's a better story teller than me."

More coherent, generally. Although he had tried hard today. "He's a good man. One of the best men I've ever known. Now..."

Before more questions could come. "Who wants pizza for breakfast?!"