" Diana has frequently discussed her concerns about Camilla wither friend James Gilbey. He has provided a sympathetic ear as Diana poured out her feelings of anger and anguish about Camilla. He believes that she is unable to put out of her mind the one-time relationship Camilla enjoyed with Prince Charles. He says: “As a result their marriage is a charade. The whole prospect of Camilla drives her spare. I can understand it. I mean what the hell is that woman doing in her house? This is what she sees as the gross injustice of the thing.”
Gilbey, a motor-trade executive, has known Diana since she was 17 but became much closer to her when they met at a party hosted by Julia Samuel. They talked long into the night about their respective love lives--he about a failed romance, she about her fading marriage. In the summer of 1989 she was concerned about winning her husband back and forcing him to make a break with the Highgrove set. He recalls: “There was enormous pride at stake. Her sense of rejection, by her husband and the royal system, was apparent. "

― Andrew Morton , Diana: Her True Story in Her Own Words