Welsh couple Jonny and Sarah have been trying to 'open up' for two years, but keep bottling out at the last minute. Will they be able to overcome their nerves and how will Jonny feel if he needs to share Sarah with another man? Tanith and Paul have to confront the fact that their partners Mark and Chloe had sex with multiple people on their first night at the retreat, while they went back to their bedrooms alone. With a second night ahead, it remains to be seen whether they can yet partake in sex with their partners and other people