Isabelle Warburton has been told off by Big Brother for peeing in the hot tub.
In chaotic scenes on tonight's show, Isabelle is seen urinating in the garden.
The housemates then have fun playing Truth or Dare where Ellie dry humps Kieran, and Chanelle presses her breasts into Isabelle’s face.
To top the evening off, Isabelle then wets the bed.
Today in the house, Big Brother invited Isabelle to the Diary Room for a chat.
"Did you have a good time last night?" began Big Brother, "Speaking of last night, Big Brother just wants to talk to you about last night."
Big Brother went on: "Last night you urinated in the hot tub."
Isabelle protested: "I didn't fully, I just laughed and a little bit came out... It wasn't really bad."
But Big Brother continued: "Urinating in the hot tub is quite unhygienic isn't it? In future, Big Brother suggests if you find yourself needing to go the toilet, you get out of the hot tub and go to the nearest toilet.
"There are many toilets in the house that housemates can urinate in."
Isabelle replied: "Yeah I apologise."
Big Brother concluded: "Don't let that happen again."
Elsewhere in tonight's episode, Isabelle is appointed the Big Brother house guru as part of the current Peace and Love shopping task. She must impart her wisdom on the housemates and can ask any questions she would like.
Kieran 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.
Meanwhile, Isabelle talks to Chanelle about her sexual experiences with Kieran on the outside of the house in rather graphic detail.
Big Brother 2017 continues nightly on Channel 5.