"Ask your daughter," Sarah Jane murmurs as she vainly attempts to rock the girl in her arms. The crying persists, perhaps now louder than ever. There are a couple of grabbing motions that remain undecipherable to Sarah.

"I can't get her to stop crying, James." By now, she's wide awake and worried. "I'm a complete and utter failure as a mum. I can't figure out what she wants."