Charlie Sheen shares a bed with his two girlfriends.

The 45-year-old actor lives with 24-year-old porn star Bree Olsen and former nanny Natalie Kenley in a Los Angeles mansion, and the women have explained they all take turns sleeping in the middle of one bed - but do have the option of going to another one if they need sleep.

Asked if the group have sex together, Bree said: "We do whatever Charlie wants us to. This is the type of lifestyle I've always wanted and I'm thrilled with it."

Natalie added: "Our bed is big enough for all three of us, and we take turns sleeping in the middle. If someone is really tired, there's always a place for them to sleep in peace."

The pair - who refer to their relationship using the US football term 'The Wedge' - also believe they are "looking out" for the troubled star, who recently lost custody of his 23-month-old twin sons Bob and Max after allegedly threatening to "cut off" their mother Brooke Mueller's head.

Bree told the New York Post newspaper: "It's an unconventional family. Charlie is the man with the ball and we're on either side looking out for him.

"All three of us are in a relationship, and if Charlie ever wants to go outside 'The Wedge' and act out on his sexual desires, that's fine with Natty and me. We're laid back."

She also claims she is happy with the state of their relationship because the troubled star is being honest about what he wants rather than being a "hypocrite".

Bree added: "In my experience, most guys are hypocrites -- they will say one thing and think another. Charlie is living it up. Men are programmed to want to reproduce. They are genetically engineered to try and have sex with as many women as they can."

Charlie has recently joined twitter - gaining one million followers in 24 hours - and he has used the site to highlight his concern for his kids.

Writing after a three-hour break from posting, he said: "Pardon my absence.... My first concern is my kids... Back soon..!(sic)"