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Report: "Twilight" Star's Affair Was 'Going On for Months'

Michael Tran/FilmMagic(LOS ANGELES) -- While photos of their hookup hit newsstands, a new accusation seeks to shatter Kristen Stewart's excuse that her make-out session with her married Snow White and the Huntsman director, Rupert Sanders, was a "momentary indiscretion."

Leopold Ross, the brother of Sanders' jilted wife Liberty, reportedly told the U.K. newspaper The People that the fling was going on for months.

"It was from the last half of filming and all through post-production, clear into last week,” Ross declares.

Liberty Ross' camp says The People story isn't true but the newspaper is standing by the story, reports People magazine.

Meanwhile, Stewart has moved out of the Los Angeles home she shared with her boyfriend of three years, Twilight co-star Robert Pattinson, who reportedly requested the move, according to People. Pattinson had moved out of the three-bedroom home when the news of the affair broke but will reportedly move back in, alone.

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ABC News Radio