Harry would have agreed with Lily about the regression. At first, it was funny to see all the kids going around and being mischievous, but it had grown tiring after he'd tripped over a fair few of them while walking about.
"Whatever you're used to," he answered without hesitation. He had grown used to the idea of having children in the future - after all, what else would he do? Be a hermit all his life and never have a family? He wasn't like the Dursleys, afraid of anything out of the ordinary. "If you like to call me 'Dad,' I'm fine with that." He shrugged and smiled at her. "You don't have to worry about freaking me out or anything."