Rob Pattinson 'In Shock' Kristen Stewart Cheated, Unsure What To Do

Rob Pattinson has yet to speak out publicly regarding his girlfriend Kristen Stewart's recent cheating admission, and new reports suggest that he is confused and unsure what to do.

The 26-year-old is said to be "in shock" after learning that Stewart, his girlfriend of three years, confessed to having an affair with a married man.

"Rob is in shock that Kristen cheated on him, he is absolutely devastated. But right now he doesn't want to say anything in public until he figures out what he's going to do," a source close to the actor told Radar

Stewart, 22, was photographed intimately hugging 41-year-old Director Rupert Sanders, who directed her latest film "Snow White and the Huntsman." The close embrace led to speculation that the pair was having an affair.

"I'm deeply sorry for the hurt and embarrassment I've caused to those close to me and everyone this has affected. 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," Stewart said in a public statement.

Pattinson met Stewart while filming the first "Twilight" movie in 2008 and the pair began dating shortly after.

He recently spoke out regarding adultery and said that it is one thing that he does not understand.

"There's a thing I've never got: that is, why do people cheat?" Pattinson told Italy's Vanity Fair magazine for its April 2012 issue.

"I can understand the impulse (to cheat) but not how you can keep two relationships going at the same time for long. I'm not the casual-affair kind of guy. If I choose to be with someone it's because I really want it. When I have a relationship, I'm 100 percent into it," he explained.

Sanders, a father of two, is married to model Liberty Ross, sister of Oscar-winning composer Atticus Ross. He also addressed the affair.

"I am utterly distraught about the pain I have caused my family. My beautiful wife and heavenly children are all I have in this world. I love them with all my heart. I am praying that we can get through this together," Sanders said in a statement to Reuters.