In 1770, when Louis was 15, he married Marie Antoinette, an Austrian princess. They had met only two days before the wedding. Many people in France did not want Louis to have an Austrian wife, because France's alliance with Austria was not popular. The two countries had been enemies until 1756, when they had become allies. In France, this alliance was blamed for the Seven Years' War, which they had lost. Louis and Marie Antoinette were not close in the early years of their marriage, but they did grow to love each other. It was not until 1777 that they had sexual relations. They did not manage to have children for several years after that. This made the marriage difficult. The situation was made worse when rude pamphlet called "libelles" were published. These "libelles" mocked them for not being able to have children. One asked: "Can the King do it? Can't the King do it?" In the end, he and Marie Antoinette had four children: