Did K-Stew cheat on R-Patz? Robert & Kristen Wed-25-Jul-12 18:14 Share this It seems the honeymoon is over... One of Hollywood's most talked about couples may have called it quits - all because Kristen Stewart couldn't keep it in her pants.What's been hailed as a mistake and a 'complete lapse of judgement' on her part could have ruined her relationship with Robert Pattinson forever. According to sources, Kristen got a wee bit cosy with Snow White & The Huntsman director, Rupert Saunders. And to make matters even worse, Saunders has a wife and two kids.A rep for Stewart had no comment. You May Also Like Same age celebrities Kristen Stewart explains cheating Big hair trend Become a fan of The Edge on Facebook and on Twitter .