Kristen Stewart Shocking New Report: She's a Serial Cheater 1Kristen Stewart once a cheater, always a cheater? A shocking new tabloid report claims her affair with “Snow White and the Huntsman” Director Rupert Sanders was far from her first. She allegedly had numerous flings behind Robert Pattinson’s back.

The report, however, comes from one of the less-than-reliable tabloids with a history of stretching, if not making up, facts. Nonetheless, the story throws the “Twilight” couple’s reconciliation fairy tale for a loop.

OK magazine claims in its latest edition that Stewart’s close friends weren’t surprised when she was photographed by a paparazzi in Sanders’ arms over the summer. The photos were published in UsWeekly, blindsiding Rob, who was living with Kristen at the time.

Kristen reportedly created an elaborate ruse to keep Rob in the dark about her liaison with Sanders, convincing the “Twilight” star she was going to a business meeting to cover her tracks.

The new report, again, citing unnamed “sources,” claims that Kristen’s dalliance was one of several. “When they first got together, she was going back and forth between Rob and her ex-boyfriend Michael Angarano,” according to the source. “Eventually she did end it completely with Michael, but it went on or a lot longer than Rob ever knew.”

But that’s not all, and this claim seems to stretch credulity: Kristen reportedly had a “thing” with “Twilight” co-star Taylor Lautner. “Everyone knows about their friendship, but not very many people know how close they really got,” according to the source. “She even lied about it to Rob.”

Stewart also reportedly had an affair with a production assistant on her movie “Welcome to the Rileys,” with James Gandolfini and Melissa Leo. “Luckily the guy had a girlfriend, so he was just as paranoid as she was and they kept it pretty well hidden,” the source said.

Here’s the problem; unless Stewart comes out and confesses, or one of her supposed lovers steps forward, this type of story is impossible to verify. But Kristen is to blame on one count; because she was caught in one affair, she’s opened herself up to all kinds of sordid allegations.

But barring any real evidence, it’s just another tabloid exploitation story. Click here to follow TheImproper on Twitter for more Robert Pattinson and Kristen Stewart updates you can trust.