Kristen Stewart Cheats on Robert Pattinson

Kristen Stewart has been caught cheating on boyfriend Robert Pattinson. PEOPLE and US Weekly report that Kristen had a fling with the married director of Snow White and the Huntsman Rupert Sanders. SCANDAL!!!

It's like a real life Bella cheating on Edward by making out with Jacob! Bella is a slut. :)

Details:

From PEOPLE:

The relationship between Kristen Stewart and Robert Pattinson has been rocked by the revelation that the actress had a brief fling with a married director, sources tell PEOPLE.

"Kristen is absolutely devastated," says one source. "It was a mistake and a complete lapse in judgment."

The hookup with Stewart's Snow White and the Huntsman director Rupert Sanders occurred recently, the source says.

From US Weekly:

Robert Pattinson's biggest fear has been realized.

On July 17, the 26-year-old actor's girlfriend and Twilight costar, Kristen Stewart, 22, was caught in a series of steamy rendezvous with her Snow White and the Huntsman director, Rupert Sanders, 41 -- and only Us Weekly has the photographic evidence.

Sanders -- married to British Vogue model Liberty Ross, 33 -- has two children, ages 7 and 5. During his marathon makeout session with Stewart, "it seemed like they couldn't get enough," according to one photographer.