For the Good of the Kingdom
King Rhaegar's sudden decline and the anticipated political turmoil that will follow his death prompts the dying king to call for an ancient ritual, first performed by King Maegor Targaryen and his mother Queen Visenya. The ritual, only performed in dire times, calls for the union between the prospective Targaryen King and his mother. Due to Rhaegar's heir not being born of two Targaryen parents, Rhaegar orders that his son also marries his grandmother, Dowager Queen Rhaella. Prince Jonothor's twin and sister-wife, Daenerys Targaryen, approves of such a union.