It's bath night for Rosie which, as usual, ends in bubble-filled carnage as both Simon and Emily battle to get an unwilling and slippery girl out.

Emily strategizes that she can trick Rosie into getting out by putting the bubble bath tantalisingly out of reach and secretly waiting outside to pounce. This game of 'bubble chess' swings back and forth as Rosie works out how to stay one step ahead of her mum.

In the earlier timeline, Emily struggles to connect with Rosie, whereas Simon has a bonding moment when she does the biggest poo he's ever seen. Tensions build between them over whether, given a magic wand, they would change Rosie.

Simon's mum and stepdad have come to stay. They want to take Ben back down to Devon for three weeks in the summer, which causes Simon and Emily to wonder why they are not willing to take Rosie. While Simon and Emily go on a rare night out, nana and grandad look after the kids, but when they return, they sense that something has gone wrong.