Lady Henrietta Berkeley (c. 1664–1706) was an English aristocrat notorious for having an affair with her elder sister's husband, Lord Grey of Warke.

When Grey was implicated in the Rye House Plot the following year, the couple fled to Cleves, with Turner in their entourage.

[3] Lady Elizabeth banned the lovers from seeing each other and took Berkeley to the family seat at Durdans in Epsom, outside London.

[5][1] At the court of the King's Bench, when the jury were about to retire to consider the case, Berkeley sensationally announced that she had left her home of her own free will and declared that she was now the wife of a William Turner, who happened to be a servant of Grey.

The Lord Chief Justice, Francis Pemberton, told her "You have injured your own reputation, and prostituted both your body and your honour, and are not to be believed".

[1] Swords were drawn and in order to break up the scuffle, the judge decided Berkeley and her alleged husband were to be detained in the prison below the King's Bench for their own safety.

[1] Grey returned to England as a leader of the unsuccessful Monmouth Rebellion in 1685, then obtained a pardon from King James II, regaining his honours and later becoming 1st Earl of Tankerville.

[1] Later, in the 19th century, George William MacArthur Reynolds wrote that Berkeley "unfortunately sacrificed her good name and affections of doting parents at the instigations of a consummate scoundrel".