Has K-Stew Cheated On R-Pattz With SWATH Director?
US reports claim Kristen has had a fling with Rupert Sanders...
Kristen Stewarthas allegedly been unfaithful to boyfriend Robert Pattinson with married film director, Snow White And The Huntsman - with pictures of the pair embracing splashed all over the front cover of the publication.
A source also told the mag that the Twilightstar and Sanders - who is married to British Vogue model Liberty Ross - seemed like 'they couldn't get enough' of each other after being caught cuddling.
A separate insider also told People.com: "Kristen is absolutely devastated. It was a mistake and a complete lapse in judgement. 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."
Both the 41-year old filmmaker and Stewart are yet to comment on the rumours, with his wife Liberty cryptically retweeting the following quote from the late Marilyn Monroe: "Sometimes good things fall apart so better things can fall together."
She later added: "If you find it in your heart to care for somebody else, you will have succeeded."
R-Pattz also hit the headlines this week for discussing reports that he's engaged to Kristen, telling BlackBook: "There was a magazine, with these pictures, saying I was getting married.
"No-one ever knows what is true or what isn't. Even my own mum called to ask me if it was true."
Keep it MTV.co.uk for more on this story...