Kristen Stewart Allegedly Cheating on Rob Pattinson

Kristen Stewart was caught cheating on boyfriend Rob Pattinson with director Rupert Sanders, allegedly.

UsWeekly broke the news of the alleged affair between Stewart and her Snow White and the Huntsman director. Not only is Sanders twice Stewart’s age, but he is also married with two children. Stewart and Sanders were said to making out in a vehicle.

An insider spoke to PEOPLE about the situation and hinted that Stewart indeed cheated. “Kristen is absolutely devastated. It was a mistake and a complete lapse in judgment. She wasn’t having an affair with Rupert. It was just a fleeting moment that shouldn’t have happened. She never meant to hurt anyone. She’s a good person who just made a bad choice.”

Reps for both Stewart and Sanders have yet to comment on the allegations.

Kristen Stewart and Robert Pattinson met on the set of the first Twilight movie.