In an Interview with The Daily Telegraph, the 24-year-old blonde revealed that Erin and Eden slept together in the villa's main bedroom where everyone sleeps.
"They high-five each other after and do a big thumbs-up. Everybody knows when it is going to happen. It hasn't happened every night, though."
She continued: "By the way, they wouldn't mind me saying that, they are pretty open about it all."
This isn't the first time an eliminated contestant has opened up about what happens behind the scenes on the popular reality TV show. Just last week, Kim Hartnett confessed that stars of the show were '100 per cent' having sex inside the luxurious Villa.
"It’s pretty obvious for the audience to know which ones are doing it," she revealed to news.com.au,
Although she chose not to make sexual contact with Josh in their bed, Hartnett openly suggested there was one unnamed couple who had no problem allowing fellow housemates know they were getting intimate between the sheets – while in the same room with multiple people.
"I think the first night they did it they full-on had an audience, everyone was sitting up and watching them," Hartnett continued.
"Then it just got to the point where you were used to it. It was kind of like a bedtime lullaby if they didn’t do it you’d be like, ‘what’s going on?’"
Somehow, we believe these claims!