Because of the Montpensier's fortune, of which Marie was the only heiress, and despite the aversion shown by Gaston toward this arranged marriage, Louis XIII and Richelieu were determined the marriage would take place.
Karena harta Montpensier yang diwariskan kepada Marie, dan meskipun rasa keberatan terlihat oleh Gaston terhadap pernikahan yang diatur ini, Louis XIII dan Richelieu memutuskan bahwa pernikahan ini akan tetap dilangsungkan.