LIBERTY Ross, the wife of Kristen Stewart’s lover, appears to have posted a spoof picture of Snow White online in a jibe at the actress who cheated on Robert Pattinson with her husband.Stewart’s affair with married English director Rupert Sanders emerged earlier this week when the Twilight star admitted to the fling in an apology to her British boyfriend Robert Pattinson. The 22-year-old starred in Sanders’s Snow White and the Huntsman film alongside Charlize Theron and had been photographed with him.  Both have issued apologies to their partners but Sanders’s model wife Liberty Ross appears to have come out against Stewart using social media.  Using the picture sharing app Instagram, a user with the name libertyross reportedly uploaded a picture of Disney’s Snow White in tears drinking from a bottle. It was captioned: “Not so pretty or pure after all” in an apparent reference to Stewart’s part in the fairytale remake.  Miss Ross had previously praised Stewart, telling a reporter at the film’s premiere in London that she was “my number one choice” for the role.   –TG