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.

Nanny Mewes takes on triple trouble in Horley, Surrey, as she offers to help parents Sam and Jason and their four-year-old triplets. The lives of parents Sam and Jason are blighted by the daily barrage of tantrums and bad behaviour from their four-year-old triplets Abbey, Chloe and Emma. With the couple in danger of splitting up over how to discipline - dad believes in smacking, while mum firmly disagrees - the family are at breaking point. Nanny Mewes moves into the family home to implement her three-day action plan.