Isabella was convinced by the "Cortes" to marry her cousin, a Bourbon prince, Francis, Duke of Cádiz. Her younger sister Maria Louisa Fernanda was married to the French king Louis-Philippe's son Antoine, Duke of Montpensier. The Affair of the Spanish Marriages threatened to break the alliance between Britain and France, which had come to a different agreement over the marriage. France and Britain nearly went to war over the issue before it was resolved; the affair contributed to the fall of Louis-Philippe in 1848. Fury raged in Spain over the queen's nonchalance with the national interest and worsened her public image.