We begin with allegations that for cheers, tv chef nigella lawson was a secret drug abuser. Two of her assistants have been charged with defrauding her and her ex-husband, for hundreds of thousands of... See More
We begin with allegations that for cheers, tv chef nigella lawson was a secret drug abuser. Two of her assistants have been charged with defrauding her and her ex-husband, for hundreds of thousands of dollars. Lindsay dais has the story for us. Reporter: This morning, they are back in a london courtroom, accused of spending nearly $500,000 of celebrity chef nigella lawson and her then-husband's money, without their knowledge. But in a bizarre twist, it's now the popular tv cook who seems to be getting burned by the sisters, who are accusing her of abusing drugs. These are the traditional flavors. Reporter: The bombshell allegations are part of the defense in court. Their lawyers claim lawsen used cocaine, marijuana and prescription drugs on a daily basis. And they had a tacit understanding they could use her then-husband's credit card, as long as they kept her alleged drug use from them. A strategy is going to be attack the credibility of a prosecution witness. I think that's what's happening here. Reporter: The domestic goddess now has a new nickname from her multimillionaire ex-husband, charles saatchi, who in an angry e-mail to his former wife, described her as highgella. You were so off your head on drugs that you allowed the sisters to spend whatever they liked. And, yes, I believe every word they've said. This is half the squash. Reporter: Some speculated maybe a case of sour grapes. Lawson and saatchi's marriage soured, when a photographer captured this moment, with his hands around her throat. And suggested in court, that incident had something to do with lawson's alleged drug use. If they were to later determine that the allegations were untrue, it kind of already taints the trial. Reporter: A publicist for lawson told abc news, we can't comment, as the court proceedings are live. The prosecution calls the ail dags allegations. And they didn't make the allegations until a year after their arrest. Lawson hosts the show, "the taste," which returns to abc on january.
This transcript has been automatically generated and may not be 100% accurate.