When Lee and Lucy are asked to cover for Anna on more than one occasion, so that she can go out at night and have secret Italian lessons, they suspect the worst – that she is having an affair. Lee decides that it is up to him to tell Toby that his marriage is in jeopardy and sets about finding the evidence.

To take advantage of three free tickets to Adventure Canyon Theme Park Lee takes Mollie out of school for a day and gets into trouble from the new head teacher, Miss Anstis. Now all he has to do is think of an excuse to justify Mollie's absence and what could be simpler than a trip to the dentist?