Celebrity news tells us that RUPERT SANDERS’ brother-in-law is claiming that the director’s affair with KRISTEN STEWART has been going on for months.

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Contrary to what Kristen said in her public apology to her cuckolded boyfriend Robert Pattinson, her scandalous affair with her “Snow White and the Huntsman” director Rupert Sanders was not just a “momentary” fling.

At least not according to Rupert’s relatives.

Rupert’s brother-in-law, Leopold Ross, a British ­guitarist who is based in Los Angeles, has revealed in a recent interview that the cheating has been going on for a long time… months before July 17, which was the day Rupert and Kristen were photographed engaging in a steamy tryst at a secluded area in Los Angeles.

Ross tells British tabloid The People:

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

He also spoke about his sister Liberty Ross, who has been with her philandering husband ever since she was a teenager, and has since left her career and her homeland to support Sanders and allow him to build a career in Hollywood as a director.

Leopold shares:

“[Liberty] made some sacrifices for something she thought was worth it, now she knows, right? Doubt it was worth it but it’s life. It might actually make things better in the long run. She wasn’t that happy for a while, but our family is close, she’ll be all right.”

Photos By PR Photos

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