Alice Perrers is infamous in history as the mistress of King Edward III of England. Most of the scandal was created after the death of Edward's wife Philippa of Hainault, as it was after this that Edward gave lands and jewels to his mistress and paraded her publicly.
Alice is depicted in the chronicles as being ugly but "scheming", and was widely blamed for abuses of the law around the country. Alternatively she was a clever woman who managed her lands like a proper business and made a good living from what she was freely given by the King. You can decide which version you believe.