Nothing would stop Frances Howard from marrying the love of her life. Not the fact she was already married, and certainly not having to murder her lover's best friend.
The Murder of Thomas Overbury by the Notorious Frances Howard
Lucy Hay, Countess of Carlisle: Courtier, Muse, Revolutionary, Spy
Lucy Hay was the great-great-grandniece of Anne Boleyn, the inspiration for Milady de Winter from The Three Musketeers, and a completely badass lady spy.