Kimberly Kisselovich and Steven Goode had sex in the BBUK house in this evening's show.
Before tonight's episode, Channel 5's voice had warned that the show would feature scenes of "intense sexual intercourse" in what was described as one of BB's most graphic episodes ever.
After all the other housemates were asleep, Steven was seen doing the deed with Kimberly in bed before the pair declared their love for one another.
Although not before Steven had quipped: "We're dirty people."
Earlier in the day, Steven and Kimberly had argued about her supposedly ex boyfriend after pictures of him were spotted in the bedroom.
Steven complained: "I’m just confused because my idea of going on a break is that you don’t sit there and look at pictures of the person you’re on a break with.
"You’ve been hiding them a little bit; you should have just been like ‘just to let you know I did bring photos of him in’.
" If it was me, I wouldn’t have even told me about that, I would have chopped them up and chucked them straight in the bin. That’s just how I would deal with it.”
He added: " I feel like someone w**ked all over my face, that’s how bad I feel. I feel like someone’s jacked off all over my face and said ‘there you stupid fool’ that’s how I feel."
Later, Kimberly cut up the pictures of her ex-boyfriend with Helen having told her: “You should destroy them.
"You can always respect him in your mind but while you and Steven are starting out and the bulls**t that’s already caused problems this week…is it really worth it? it’s not worth the trouble”
Big Brother continues nightly on Channel 5.
Browse pictures from tonight's show below...