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. They later returned for a visit to England; on this occasion, Enguerrand was made Earl of Bedford on 11 May 1366, which made Isabella Countess of Bedford as well as Lady of Coucy. After the birth of Isabella's second daughter, Philippa, in 1367, Enguerrand and Isabella were also made Count and Countess of Soissons by Edward. Because her husband also served the King of France as a military leader, he was frequently away from home; consequently, Isabella, though living principally with Enguerrand at Coucy, made frequent visits to her family in England. She was made a Lady of the Garter in 1376.