NEW : Prosecution says Lawson spent company money on trips , shopping . Grillo tells the court she 'd see Charles Saatchi with white powder on her nose . Francesca Grillo and her sister CNN deny defrauding Lawson and Lawson . Lawson 'ashamed ' of drug use , court hears . Both sisters say that their spending on personal items was approved by Charles Saatchi .
NEW : Prosecution says Lawson spent company money on trips , shopping . Grillo tells the court she 'd see Charles Saatchi with white powder on her nose . Francesca Grillo and her sister CNN deny defrauding Lawson and Lawson . Both sisters say that their spending on personal items was approved by Charles Saatchi .