Were Charles and Diana, the two cells of the ever-rising British royal family, able to taste the sweetness of success and satisfaction until the end of their life together? As we go back to the reasons behind the incompatibility in the lives of the youngest of the twentieth century of British royal family, Charles, Prince of Wales and Diana, Princess of Wales, and their separation, we come to the scrolls of their extramarital affairs. Only when both hands clap will there be a sound. It is a fact that in a life that lasts only a moment like a crystal ball, to break a sacred, marriage-like sanctity, the two parts of it can only be shattered if the husband and wife think together. In a marriage where mutual care and love are the basis, if someone’s interference is significant, it will fall into disrepair. Charles and Diana’s intimacy is a relationship that has been ingrained in love since childhood and adolescence. In order to infiltrate it and break up their relationship, some people came in between them as an extramarital affair. Through this book we will try to find on how one of her own bodyguards, Barry Mannakee, influenced Princess Diana’s life and how it changed their lives. Let’s take a look at how Diana, who was a huge success as a mother, got into such a relationship and the reasons behind it.