The couples are off to the naming ceremony of Alan and Joyce's first granddaughter Scarlett. Joyce thinks her daughter-in-law Suze is deliberately keeping her away from the baby so suggests to Alan that he give the young couple money as a gesture of support.

Carol is buoyant about her latest venture, an erotic novel she's writing as part of a new creative writing course she's taking, although Trevor is more than a little concerned about where some of her inspiration is coming from.

Meanwhile, John and Maureen have Vaughan, Suze's father, in their sights, as he's a member of an exclusive boat club, but it turns out he and his wife Sally may be willing to give them more than just a recommendation.

Joyce eventually gets the pictures she wants of her and baby Scarlett but in doing so may have jeopardised her relationship with Suze even further. Carol strikes up an unlikely alliance with Sally and Vaughan who want to talk about crowdfunding her novel. They invite her and Trevor to stay over and take the discussion to the next level.

It's John's birthday and he has decided to do something different this year - a murder mystery party, where all the couples have to come in fancy dress as characters in the mystery. Soon, however, there is a real life mystery: is it Maureen or her alter ego Lady Greystoke that's having an affair? Will Alan's success at re-gifting eventually come back to haunt him? And who is the exotic-sounding 'Diego'? John just wants someone to take the game seriously.