"What?" Sirius blinked. "No, not at all. I get along with babies." He jerked his head at Harry. "Spent a lot of time taking care of that one, back when he was a babe. It's little kids that I know nothing about."
He glanced over at the little red-haired girl who had come in with Harry and Hermione. That was bound to be Leila. Really, he didn't know what Harry expected him to do there; he knew nothing about children that age.
Pulling his attention back to Gawain, he reached out to slip an arm past Neville's and under the baby's legs. "Come here, little man. Let's give your daddy's arms a rest, yeah?"