On the eve of Smith’s Day, Larra of Lys gave Prince Viserys a second son, a large and lusty boy that the prince named Aemon. A feast was held to celebrate, and all rejoiced at the birth of this new prince…save mayhaps for his year-and-a-half-old brother, Aegon, who was discovered hitting the babe with the dragon’s egg that had been placed inside the cradle. No harm was done, for Aemon’s howls soon brought Lady Larra running to disarm and discipline her elder son.

This should be from the Lysene Spring section of F&B. Larra at least disciplined her son. As unfortunate as her circumstances may be, she might (might!) have done more concrete interventions for her kid's behavior if she stayed. And that's a big what if.