Kristen Stewart's Fling With Rupert Sanders Just Happened, Not On-Set 'Snow White' Affair

Now that Kristen Stewart and Rupert Sanders have confessed to their affair, new details are emerging and E! Onine is reporting it wasn't an on-set hookup, which one would assume since Rupert was her director in Snow White and the Huntsman.

A source claims nothing took place until after the film and international press tour wrapped.

"I can guarantee you 100 percent that nothing happened when they were working — nothing!" the source said.

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The two were caught kissing just last week and paparazzi snapped them getting hot and heavy. The photos surfaced on Tuesday and it's been torture for the two who both released public statements of apologies ever since.

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"She knows she messed up big time," the source said. "There's no getting around that. She's not doing well, but what do you expect?"