He knows what Fleur is capable of doing: he's seen her in action.

But he loves her; he loves all of her. The good and the bad.

Straining forward, he kisses her mouth. It's a reckless thing to do in the midst of this conversation, but he can't help it. She's a challenge, an adventure, an opportunity.

Bill lives for adventure.

He would love to live for the adventure that is Fleur.

"I think," he breathes between kisses, "that we make a very good pair."

It may not be a direct answer, but it's the one he means to give.