Kathryn travels to East Grinstead to help parents Susan and James with their three-year-old twins Alfie and Harry. With stay-at-home dad James tackling temper tantrums on a daily basis and mum Susan dreading returning home from work to an exhausting bedtime ritual, the family urgently needs help. Nanny Mewes tackles the fussy eating and bad behaviour which has left the family unable to go out in public without fear of a major incident. However, when the focus shifts from the boys onto mum and dad, Nanny Mewes questions whose behaviour it is that's really causing the problems?