 Isabella and her husband, along with other disgruntled nobles, including her son-in-law Raymond VII of Toulouse, sought to create an English-backed confederacy which united the provinces of the south and west against the French king.She encouraged her son Henry in his invasion of Normandy in 1230, but then did not provide him the support she had promised.In 1244, after the confederacy had failed and Hugh had made peace with King Louis, two royal cooks were arrested for attempting to poison the King; upon questioning they confessed to having been in Isabella's pay.