Karly and Sophie told housemates they had sex with each other on camera.

The blonde 'Big Brother' beauties - who have both stripped off for men's magazines - spent the early hours of this morning (08.06.09) teasing male housemates Siavash, Cairon and Freddie by pretending they had starred in a porn movie together.

In a steamy conversation in the kitchen at around 2am, Sophie said: "Sometimes we just stay in bed and have sex all day. With each other."

Events organiser Siavash quickly replied: "I'll take you back to my Penthouse and show you how it's done!"

However, Karly quickly refused his offer.

She said: "No, we're lesbians."

Sophie corrected: "Lesbian porn stars. Well, bisexual. We'd try a man."

The girls had given their idea so much thought, Karly has even made up a name for their imaginary movie.

Minutes later she joked: "Our porn movie was called, 'She's the t**s, I'm the a**e'."