IMVHO The sisters have been using the Saatchi credit card for years, and as their expenditure increased, nothing was said by their employers, the accountant simply upped their credit card limit again and again until it hit £100k. You don't have to be a common or garden thief to keep spending, especially if you have no idea you are doing anything wrong, as no-one has told you!!!. It seems that the boundaries were so blurred and they were so used to living in the lap of luxury that it became the norm for them. Twelve years of spending (one sister joined the family in 1999) is a long time to get used to it and having a paymaster displaying an almost contemptuous attitude towards money and accounts would have seemed almost encouraging .After all,Saatchi himself admitted in court that figures on pages "bored" him and that he had no idea how his cards were paid off. More importantly, it seems the sisters were made scapegoats as another assistant, whose expenditure was greater than the Grillos, was not prosecuted!!!! From The Telegraph "Isleworth Crown Court, west London, heard that the sisters were two of five aides to Miss Lawson and Mr Saatchi who had credit cards linked to Mr Saatchi’s personal account. Between them they averaged £100,000 a month. The court was told that Elisabetta, who allegedly defrauded the couple out of £105,000 over a four-year period, spent less on the credit card than Anzelle Wasserman, another assistant who is not under suspicion".
An interesting fact is that Nigella moved out from Saatchi's a year before the Scott's incident, with one of the Grillo sisters:- www.dailymail.co.uk/news/article-2515338/Nigella-Lawson-Charles-Saatchi-aides-blew-1m-year-credit-cards.html
Are the two sisters just casualties of the divorce, resented by Saatchi for years, who now provide CS with a stick with which to hit Nigella? Nigella has been dragged into it by default maybe, from the Independent;- "Saatchi said Miss Lawson was “very cross” with him when he told her he had confronted the Grillos about their alleged misuse of his company credit card but it was Miss Lawson’s idea to call the police"and the mudslinging has started. I feel very sad for the kids, not only has their home been shattered since the divorce, they have lost two people who have cared for them since they were small.