Charlize Theron said to be 'fuming' over Kristen Stewart's affair with director Rupert Sanders

RadarOnline reports Theron became "tight" with Sanders' wife Liberty Ross during filming and feels Stewart has betrayed her.
“Charlize is absolutely fuming with Kristen for having an affair with Rupert,” an told the gossip site.
"She is very tight with Liberty, has often socialized with the family over dinner, and cannot believe Kristen has done this.
"When they were filming Snow White and the Huntsman, Charlize felt like an older sister to Kristen, and they were always sharing advice ... She even asked Kristen if she wanted to be her baby Jackson’s godmother."

Charlize has reportedly been left in a "rock and a hard place" as she feels great sympathy for Liberty, but has a "sisterly love" for Kristen.