Open House: The Great Sex Experiment

Welsh sweethearts Mady and Nathan are interested in bringing another woman into their relationship, a process that begins by having a threesome.

Married couple Mike and Jess seek advice their first ever threesome with another woman. The experience uncovers some difficult emotions for Jess.

Welsh couple Liam and Stacey want to try to open up by fulfilling a special fantasy of Liam's - watching Stacey have sex with another man.

Having been to sex parties before, married couple Al and Jasmine seek to find out if opening up their relationship can spice up their sex lives.

London couple L'Oreal and Kalid want to explore whether opening up sexually to other people could help them stay together for the long-term.

Influencer couple Caius and Eli want help in organizing their first threesome, but with deep-rooted emotions at play, have they prepared themselves?