Uh-oh. Looks like the Twilight couple that have been pretty steady over the past few years aren’t really that steady after all. It has recently been found out that Kristen Stewart had a fling with her Snow White and the Huntsman director Rupert Sanders.

Although she appeared in public with her boyfriend Robert Pattinson just two days ago for the Teen Choice Awards, it looks like this could affect her career PR-wise a lot.

“Kristen is absolutely devastated,” a source tells People. “It was a mistake and a complete lapse in judgment.”

If that wasn’t enough, US Weekly decided to add in a photo of the actress and the director on its front cover to imply their romantic relationship. Reps for Stewart, Sanders and Patterson haven’t commented on the case or what exactly happened yet either.

A source also revealed that Robert Patterson thought that Kristen Stewart was the one and that he would someday marry her as well:

“He worships her. He doesn’t think there is another woman on the planet who is as beautiful and kind as her. He wants to be with her 24/7, he wants to marry her…as far as he is concerned, Kristen is his perfect match…Kristen is perfect to him. That’s why he’s always known that someday she would be his wife.”

Kristen Stewart won’t be suffering the most from the scandal however: Sanders is married to 33-year-old model, Liberty Ross, who was also in Snow White and the Hunstman as Queen Eleanor, and have two young children together.

At least filming for Breaking Dawn Part 2 is over, not sure about how awkward things would be if they were to promote it together after the scandal though.

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