The man accused of raping a teenager at the same time as Jack Tweed told police she "did not protest" so he stayed to see if he could join in.
Anthony Davis, 26, said he was in the bedroom when Tweed, the widower of Big Brother star Jade Goody, started having sex with the then-19-year-old and decided he "may as well close the door and see what happens".
Tweed and his friend Davis both deny raping the teenager at Tweed's east London home in the early hours of September 4 last year.
The alleged victim, who is now 20, told Snaresbrook Crown Court in east London she was "horrified" and went into "complete lockdown" when Davis joined Tweed on the bed and they both raped her together.
But Davis told police he was stood between the door and the bed and could see Tweed was having sex with the teenager up against the window.
"She didn't protest it," he told police.
"She didn't say stop. She didn't say anything to suggest she didn't want it to happen.
"She didn't say anything at all."
In an interview at Ilford police station the following day, Davis, who the court heard was allegedly pestering the woman for a threesome, told officers he thought: "I may as well close the door and see what happens I guess.
"I just got closer and closer. She didn't say anything."
Davis said Tweed and the woman moved to the bed, where she looked "comfortable" and "leant her head back, looking at me", he said.
Davis said she then gave him oral sex and suggested he fetch one of her other friends from downstairs to join in.
He went on: "The whole episode in that room couldn't have been longer than four, five minutes, max, if that.
"If a girl had been assaulted or raped, she would have come out of that room traumatised.
"She would have been screaming, surely someone would have heard something."
The jury of six men and six women was told the young woman went with three of her friends to Tweed's house in Brandesbury Square, Repton Park, Woodford Green, east London, after a night out at the Embassy Club in Mayfair.
Her first contact with Tweed, a 22-year-old club promoter, was when he started kissing the back of her neck while wearing boxer shorts and a long dressing gown, the court heard.
The court was told she initially tried to laugh it off but Tweed soon became "more heavy-handed" and the situation changed when Davis stood inside the bedroom and told Tweed: "Don't worry Jack, I've got the door, do what you've got to do."
She said Tweed raped her by the window sill and, as she tried to escape, pushed her on to the bed.
Tweed then raped her again, with Davis orally raping her at the same time, the court heard.
Tweed, who married Big Brother star Goody, 27, shortly before she lost her battle against cervical cancer in March 2009, and estate agent Davis, of Stradbroke Drive, Chigwell, Essex, are both on bail.
Tweed denies two counts of rape while Davis denies one count of the same charge.
Davis added that, when the victim was having sex with Tweed by the window, her leg was in the air.
"If she did want him to stop, all she had to do was kick him and he would have been off," Davis said.