That prince Charles Lady Diana cheated with Camilla Parker-Bowles, we all know. But now it seems that he before the relationship with Diana was based with her sister Sarah. It was the British newspaper the Mirror that this discovered. The facts date back to 1977. They have then time spent together in the luxurious ski resort of Klosters in Switzerland. Eventually, it was the relationship thing, but Sarah asked Charles for her sister, with the known consequences. The couple married in 1981.