Chris and Simon, the retreat's first gay couple, are engaged to be married. Neither of them have ever had sex with a woman before, but as they approach their big day Simon wants to explore whether or not he might be bisexual and work out what that means for his identity and their relationship. Meanwhile, Tom has erectile concerns and is wondering whether participation in an orgy might help. He and his fiancée Lauren consider whether to have sex away from each other in separate rooms with resident couple Gage and Olivia.

Married couple Ashley and Tanya are seasoned swingers, but there's one boundary the Leeds couple have never previously crossed - trying to seduce and have sex with other people on their own without the other one present. After nearly walking out of last night's social, Jamie and Sharmayne still aren't sure how far they can go, so non-monogamy coach Effy orchestrates a sexy pool party to help them loosen up. After a cocktail date with resident couple Jen and Marc, they're forced to make the ultimate decision.