The raunchy 19-second clip shows a woman with dark hair, who bears a striking resemblance to the Toxic singer, performing oral sex on a man rumoured to be Federline.

    The steamy clip appearing on adult video-sharing website PornoTube is allegedly an excerpt from the honeymoon video. The footage was posted by a user identified only as "Stripper." 

    It has been speculated that the movie - reportedly made before the couple married in 2004 - was posted by Kevin as a way to get back at Britney for filing for divorce last week.

    Her dumped husband, 28, has been touting the four-hour tape for sale and a film company wants to make it available online to fans around the world, Britain's News of the World newspaper claimed.

    One close pal said: "This vid is dynamite and Kev knows it."

    Britney, 24, fears the raunchy footage will destroy her wholesome image unless she caves in to his demands for a payoff and custody of their children Sean Preston, one, and Jayden James, eight weeks.

    She is worried she will become infamous like Paris Hilton - whose home-made sex video, was put on the internet by her ex and became one of the world's most popular sites.

     "After she French-kiss Madonna on national television, she takes shots of her naked husband while he¡¯s taking a shower for television viewers, she interviews her husband during a night-time bus ride while she's naked, and she poses nude or lightly dressed for different mags, she can hardly expect to be hurt by a marital sex tape," playfuls.com website claimed.

    The home-made video is believed to show the naked couple enjoying an uninhibited range of love-making and sexual games.It was made during the first weeks of their relationship two years ago when they were holed up in one of the exclusive bungalows at the Beverly Hills Hotel in Los Angeles.

(Agencies) 

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