Queen Helaena with kids

"...Though plumper and less striking than most Targaryens, Helaena was a pleasant, happy girl, and all agreed she would make a fine mother.
And so she did, and quickly. Barely a year later, in 123 AC, the fourteen-year-old princess gave birth to twins, a boy she named Jaehaerys and a girl called Jaehaera. Prince Aegon had heirs of his own now, the greens at court proclaimed happily. A dragon's egg was placed in the cradle of each child, and two hatchlings soon came forth. Yet all was not well with these new twins. Jaehaera was tiny and slow to grow. She did not cry, she did not smile, she did none of the things a babe was meant to do. Her brother, whilst larger and more robust, was also less perfect than was expected of a Targaryen princeling, boasting six fingers on his left hand, and six toes upon each foot.
And in 127 AC, Princess Helaena gave birth to second son, who was given a dragon's egg and the name Maelor."