«Rhaella Targaryen was the daughter of King Aegon V Targaryen and the sister wife of King Aerys II Targaryen. They had three children: Rhaegar, Viserys and Daenerys.
The Mad King would become aroused by immolating his enemies, then he would pay a visit to Rhaella and molest her in extremely brutal manner. At one of those occasions, Jaime and Jon Darry stood at guard outside the queen's bedchamber, and heard her cry helplessly "You're hurting me!"
Barristan explains that Rhaella always tried to hide the worst of Aerys's behavior from their children, not wanting to frighten them.» - 48 minutes ago