London: Kristen Stewart is reportedly so distraught in the wake of her affair with director Rupert Sanders being exposed that she`s "refusing to eat".
The `Twilight` star - who is still in hiding after boyfriend Robert Pattinson walked out of their home - has become a "nervous wreck" and is "living off a diet of cigarettes, Red Bull (energy drink) and crisps", reported Showbiz Spy.
"Kristen is a nervous wreck and existing on a diet of cigarettes, sugar-free Red Bull and the occasional bag of potato chips.
"She`s been hiding out at the Los Angeles home of a producer friend and is looking pale and worn-out," said a source.
The source also said that the star was so "grief-stricken" that even when she tries to eat she gets sick.
"Whenever anyone tries to push her to eat even a small bowl of soup, she either claims that she`s just had something, which isn`t true, or that she`s nauseous and there`s no chance of keeping anything down," they continued.
"Kristen is grief-stricken and has hit rock-bottom. In many ways, Kristen living off cigs and Red Bull is a way of punishing herself."