(Cover) - EN Showbiz - Kristen Stewart "isn't as mature" as Robert Pattinson, it has been claimed.

The pair recently reunited following the scandal caused when Kristen admitting being unfaithful with a married film director.

Sources have suggested that the actor's friends do not think the former couple can truly reconcile due to them being too different. While Robert's friends believe Kristen does love her Twilight co-star, they don't think the relationship can work again due to their diverse attitudes.

"Kristen loves Rob, no question about it, but she just isn't as mature as he is," a source told Radar Online. "Rob's buddies would be stunned if the couple goes the distance."

Those closest to Robert can reportedly imagine the 26-year-old handling his promotional duties for The Twilight Saga: Breaking Dawn - Part 2 by putting on a fake show of togetherness with Kristen. They suspect he will cut all ties with his former partner once the movie hype has died down.

"Kristen and Rob's friends absolutely don't believe that this reconciliation is going to last," the source continued.

"Rob believes that Kristen didn't sleep with Rupert Sanders, but the fact is, she still cheated on him. Rob's pals think it was easier for him to get back together with her right now because of the upcoming publicity blitz they are going to embark on to promote Breaking Dawn." (C) Cover Media