It's kinda amazing, feeling the babies kick and move around. Anna's never been this close to someone pregnant before – never close enough to touch. She felt bad if she stared for too long.

They sit there until the babies settle down, but Elsa doesn't move her hands. She's staring at them, chewing on her lip. She mustn't have realised they've stopped moving.

Anna gently extricates her hands, a soft smile on her face. "That's amazing," she says. The smile that lights up Elsa's face is just as good. Maybe, maybe even better.