You were the daughter of Aegon the Conqueror and one of his sister-wifes, Queen Rhaenys, When your father Aegon, your mother Rhaenys, and your aunt Visenya waged a war to conquer Westeros, Orys Baratheon was one of their greatest supporters.
Orys was a very important commander throughout the conquest and achieved great success. One of his greatest achievements was his conquest of the stormlands. Your father, Aegon, gave him the Stormlands to rule as lord. And there was something else given to Orys for his accomplishments and loyalty in conquest...
You. You were of marriageable age, and your father, Aegon the Conqueror, thought Orys was the perfect candidate for you. Or maybe he thought you would be the perfect prize for Orys.
Your wedding to Orys was complete. For the first time you came to the storms end that was Orys's castle and your new home. Orys reached out an arm and helped you out of the carriage. Unsurprisingly, a lot of rain was falling on the storm lands. Orys said as he wrapped an arm around your waist.
"It may look a little gloomy, but you'll love the inside of the castle, princess."