Alice Perrers was quite the ambitious mistress, though we have to have some sympathy for her—she has been hated in her time and ever since.
Alice Perrers: The Manipulative Mistress

Alice Perrers was quite the ambitious mistress, though we have to have some sympathy for her—she has been hated in her time and ever since.
When Anne Boleyn was executed, her husband famously moved on eleven days later. But her mother’s devastation often goes unnoticed.
Agnès Sorel was France's first official mistress. She was known for her scandalous way of dressing that ended up becoming a little popular at court.
Lucrezia Borgia and the entire Borgia family are quite infamous. Lucrezia wasn’t exactly undeserving of her reputation, but her story is crazier than we think.
Blanche II of Navarre was just supposed to be another royal bride who went on to have a million kids. But then, her mother and brother died, and she found herself murdered.
Margaret Pole had so many traitors in her family: she was the daughter of a traitor, the sister of a traitor, and the mother of a traitor. All that treason ended in her own death.
Juana the "Mad" is known for being the insane woman who briefly ruled Castile. But the thing is, she was perfectly sane, it was the absolutely horrible men in her life that made her insane.