"You want to jump off a cliff together?"

Sure, she said fly, but ... is that not also a way to put it? In any case, the suggestion has him grinning an honest, if a bit impish smile.

"I think that sounds perfect for us, sweetheart." The formerly familiar term of endearment slips out, but he doesn't try to backpedal because of it or take it back. "Either we'll fly together or fall on our faces trying."