This development greatly alarmed his relatives, as it threatened to hinder the contemplated union of the Lüneburg territories. Indeed, if George William had had a son, a serious succession crisis could have arisen. No son however was born, because Éléonore next two pregnancies, in 1671 and August 1676 produced only short-lived daughters. Once it became clear that George William wouldn't have male heirs, his brothers relented: by family agreement signed on 13 July 1680, Éléonore was finally recognized by her husband's family as Duchess of Brunswick and, most importantly, Sophia Dorothea was declared Princess of Brunswick-Lüneburg-Celle with all appertaining rights of birth. Also, George Louis' parents finally agreed to the proposed marriage with Sophia Dorothea as a way of avoiding uncertainty and inheritance disputes. The wedding took place on 21 November 1682 but since the beginning the union was a complete failure: the feelings of hatred and contempt that Sophia of the Palatinate had over her daughter-in-law were soon shared by her son George Louis, who was oddly formal to his wife. Sophia Dorothea was frequently scolded for her lack of etiquette, and the two had loud and bitter arguments. Nevertheless, they managed to have two children in quick succession: George Augustus (born 30 October 1683 and future King George II of Great Britain) and Sophia Dorothea (born 16 March 1687 and by marriage Queen consort in Prussia and Electress consort of Brandenburg).