LONDON – Amber Heard's former personal assistant claimed Wednesday that she told the model-actress about a violent sexual assault she had endured, only for Heard to “twist" the story for her own use.Kate James gave dramatic testimony at Johnny Depp's libel trial against a British tabloid newspaper that accused the actor of abusing ex-wife Heard during their relationship.Depp is suing News Group Newspapers, publisher of The Sun, and the paper’s executive editor, Dan Wootton, over an April 2018 article that called him a “wife-beater.” He strongly denies abusing Heard.James, who worked for Heard between 2012 and 2015, gave evidence in support of Depp, and said she had told Heard that she was raped at machete-point in Brazil about 25 years.