Warwick persuaded King Edward to negotiate a treaty with Louis XI of France; at the negotiations, Warwick suggested Edward would be disposed to a marriage alliance with the French crown; the intended bride either being Louis' sister-in-law Bona of Savoy, or his daughter, Anne of France. To his considerable embarrassment and rage, Warwick discovered in October 1464 that four months earlier on 1 May, Edward had secretly married Elizabeth Woodville, the widow of a Lancastrian noble. Elizabeth had 12 siblings, some of whom married into prominent families, turning the Woodvilles into a powerful political establishment independent of Warwick's control. The move demonstrated that Warwick was not the power behind the throne as many had assumed.