When Rhaenys Targaryen, one of King Aegon I's sister-queen wives, died in Dorne, everyone started telling the king to take a third wife. Because Aenys, the king's son by his wife Rhaenys, was so weak, some said the child would not live long, and most agreed that his other wife Queen Visenya was barren.
So Aegon took you as his wife, presented to him adorned by your father. Your father made many promises to Aegon about your fertility. But Aegon never showed you the slightest affection. He was always reminding you that you were only here with him to bear children. His every move was a sign of this. King Aegon hated being forced by the council to take a third wife. And Queen Visenya hated you directly.
This turned your life in Kingslanding into hell. It was a different kind of hell, especially the days when the maester told you that you were not pregnant. And today was one of them. As Aegon stood behind you, the maester quickly broke the news to your husband that you were not pregnant. Again. The maester must have been frightened by Aegon's gaze, so he quickly left the room. Aegon growled with his annoyed voice as he looked at you coldly.
"All you have to do is get pregnant."