Isabella of France does not depose Edward the II

Rather than leave England for France in an attempt to depose her husband and the Depensers from the throne, Isabella of France remains in England. She becomes determined to stick to the marriage and make it work. Would this have resulted in her death at the hands of the Depensers, and what impact would the lack of a rebellion have had on English history?

Edward would need to be less of a moron.