Almost a year after Millie and Lauren's parents break up, they find themselves commuting between their mum's house and their dad's apartment nearby.

Millie and Lauren try to coax their reluctant dad back onto the dating scene, with consequences they could never have predicted; Mum tries too hard to get in shape for a 10k run.

Mum and Mike plan a night out, but when their babysitter cancels, they decide to leave the girls with Mike's son Craig; he's their worst teenage nightmare, even though they've just met, and quickly shows them he's in charge.

Dad has a date with Amber, who the girls think is way out of his league - so they decide to give his image a radical makeover; Craig ruins mum's plan to create a new sausage sensation for Sunnyshopper.

It's Halloween, and Amber brings her kids, Fran and Jake, over to Dad's to meet the girls; things are more frosty than spooky, especially when Jake destroys Millie's special costume; Mum thinks Craig's zombie make-up is a little too realistic.

When Mike and Craig move in, Millie has to give up her room and share with Lauren, who is not happy about it; she goes over to her dad's - only to find midwife Amber has brought a patient home with her.