When you were born as the first child of Prince Aenys, the eldest son of Aegon the Conqueror, many thought that you had pushed Maegor one step further in line to the throne. But Maegor's mother, Queen Visenya, had promised Maegor that he would marry you one day.
Maegor has never seen you as a threat until now. But when you were betrothed to a hightower, Maegor nearly went mad with anger. Both because of his jealousy and his fear that if he doesn't marry you, he will fall far behind in the throne line.
Maegor did not want to see you as a threat. So, after some insults about what kind of man your fiancée, the Hightower boy, was, he challenged him to a duel to the death to prove that he was a real man. Flustered with rage, your foolish fiancé accepted the duel, acting like the fool he was. It had taken Maegor less than two minutes to kill your fiancé. Maegor muttered, approaching you, blood smeared on his armor.
"Remember that you were promised to me first."