Amy's eyes go wide. She covers her mouth with her hands.

Amy Pond-Williams: speechless. Somebody alert the authorities.

"You can't be," she gasps, shock wearing off into a half-delighted, half-nervous little laugh; "you look different than you did then!"

She gives the TARDIS a once-over, and then suddenly the colour drains from her face.

"You and the Doctor aren't...?" she asks, resorting to hand gestures to ask the question she really doesn't want to ask.

"You know what? Never mind. I don't want to know."