Part of Nathan recognized the question for what it was – a mother's concern. Unfortunately that part was still heavily influenced by the multitude of issues between them, and so he couldn't respond to the question as might once have, with good humor and affection. Neutrality was still best.
He half-shrugged, that gesture of his that was both shoulder lift and vague assent. "Couldn't sleep, so I decided to make the most of it," he said. It wasn't being a workaholic as he'd once been. He just hadn't been able to find rest right now. "And you?"