US News

It must be undying love!

He bit.

Robert Pattinson has apparently bought the mea culpa from cheating “Twilight’’ lover Kristen Stewart and agreed to take her back, a new report says.

“They pretty much decided they couldn’t live without each other,” a source told The Sun of London about the two vampire-playing actors.

“Kristen poured her heart out to Robert and told him’’ that her recent affair with Rupert Sanders, the director of her new flick “Snow White and the Huntsman,’’ “was a one-off and a mistake.”

“Rob sees it as Kristen made a really stupid mistake,’’ the source said. After a lot of long tearful talks, they’ve worked it out.“Rob can see how truly sorry Kristen is and has totally forgiven her. They really do love each other.”

The reputed reunion comes after photos showed Stewart, 22, canoodling with the married Sanders, 41. Pattinson, 26, moved out of the couple’s love nest after the photos surfaced.

The shamed actress later tweeted: ‘This momentary indiscretion has jeopardized the most important thing in my life, the person I love and respect the most, Rob. I love him, I love him, I’m so sorry.’