She was not happy to marry her brother Aerys II Targaryen but did it due to the command of their family. They had a very bad marriage, and Aerys II Targaryen would only sleep with her after just having executed someone by burning, which aroused him perversely. He regularly abused her.
Her son Rhaegar Targaryen died during the fall of House Targaryen, when she was pregnant. She later gave birth to Daenerys I Targaryen on Dragonstone. She died during childbirth, leaving behind only Viserys III Targaryen and Daenerys I Targaryen.