Kristen Stewart ``pulling out all the stops`` to win R-Patz back

London: Kristen Stewart has reportedly vowed to "pull out all the stops" to win back boyfriend Robert Pattinson. The tearful Twilight star told friends she is desperate to make amends after her fling with married director Rupert Sanders.

But she is "confident" they will stay together – even though the Brit actor has moved out of their Hollywood home. “She is pulling out all the stops with Rob,” a friend of the actress told the Daily Star. “She is completely apologising and trying to make things right with him but she is very confident that she is going to win his trust back. “Kristen is doing everything in her power to keep Rob from breaking up with her. “She knows how much he loves her and she really believes that she is going to keep him from dumping her.” Robert is said to be ‘heartbroken and humiliated’ by the revelation of the 22-year-old’s affair with 41-year-old Rupert, who directed her in Snow White And The Huntsmen . It seems 26-year-old Rob found out about Kristen’s cheating before the picture of her cuddling Rupert was published. Backstage sources at the Teen Choice Awards on Sunday said the pair were engaged in an intense conversation “Rob and Kristen were having a long and intense conversation backstage and he looked miserable, heartbroken and humiliated. She was pleading,” the source said. ANI