The couple hooked up before the show, and Isabelle tells Chanelle all about their one-off fling in this evening's episode.
Chanelle and Isabelle talk about sex and their frustrations when men don’t know where the pleasure points are.
Isabelle then chats to Chanelle very frankly about her sexual experiences with Kieran.
Meanwhile, as part of this week's shopping task, Isabelle is appointed the Big Brother house guru as part of the Peace and Love task. She must impart her wisdom on the housemates and can ask any questions she would like.
Guru Isabelle sits down with housemates and quizzes Kieran.
However he avoids giving Isabelle, the Guru, a straight answer and comments that he answered her like a politician, whilst she gets frustrated by his evasive responses.
Later on, Kieran talks in the living room to Joe, Tom, Ellie, Charlotte, and Savannah about his problems in the bedroom. Joe offers Kieran some words of wisdom and tells him to think of sex like a horse race.
The group then discuss how many people they have slept with. Kieran admits to the group that he has slept with around 350 women.
Elsewhere in tonight's episode, Deborah joins Joe, Tom and Kieran in the garden and Joe questions Deborah about her feelings for Kieran and he playfully teases her about her crush. Deborah and Kieran joke about making babies and she admits she would like to meet someone who looks like Kieran, but is older.
Big brother 2017 airs tonight at 10PM on Channel 5.