He awkwardly hugs her back, though it's more of a matter of trying to figure out what he needs to do - where his arms should go. "For better or worse, I expect - in ... not...er."

He pulled away awkwardly and went to go look in a book.
It had been a bit of a long time since he had bothered with flirting.

He waved his hand over the pages, looking for the information he sought on the multiverse.