"In a very positive context, don't worry," she says, amused and gratified in equal measure by how obvious Charlie's reaction is when David's name comes up. "This was all before any of us knew what a snake he was, anyway."

Her smile turns a little more wistful, and she leans her head on his shoulder, letting out a soft sigh. "Knowing what I know now, of course, there's no comparison between you at all."