 They married on 27 July 1365, at Windsor Castle, by which time Isabella was in her thirties.Her father, Edward III, gave her a dowry of £4,000 and a large lifetime annual income, together with expensive amounts of jewellery and lands; de Coucy was restored to his family's lands in Yorkshire, Lancaster, Westmorland and Cumberland, and was released as a hostage without any need for ransom.In November 1365, Isabella and her husband were permitted to enter France; their first daughter, Marie, was born at the family lands at Coucy in April 1366.