Wow, the Us Weekly cover stunned everyone with its report that Kristen Stewart cheated on Robert Pattinson with Rupert Sanders (the Snow White and the Huntsman director). There are photos too.

The magazine got a hold of this shot that shows Kristen and Rupert getting close while they were filming Snow White.

And to make matters worse, people close to Kristen have reported that she's "absolutely devastated" and that "It was a mistake and a complete lapse in judgment."

The mistake was apparently nothing serious:

"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."

But even though she didn't want to hurt anyone, it seems like that's probably what happened according to the sources and photos.

Of course, every time a story comes out from a annoymous 'source', it might just be made-up gossip. However, with the photos it seems like this one could be true.

We'll see how this affects Kristen and Rob's relationship.

Source and photos: Us Weekly via JJ