Forbidden (Ser Duncan the Tall x Lannister!Reader)

On her ninth name day, during a grand tourney held in her honor, Y/N Lannister sees a knight brutally beating his young squire behind the lists. Unable to ignore it, she begs her proud father, the Lord of Casterly Rock, to stop the cruelty. When the knight mockingly tells him that if he believes he can raise the boy better, he is welcome to try, her father accepts-and the battered boy is taken in and given to Y/N as a strange name day gift. His name is Duncan. Raised beneath the lions of Casterly Rock, Duncan grows from a frightened boy into a knight sworn to protect her, and as the years pass, the bond between them deepens into a forbidden love neither dares to speak. But a daughter of House Lannister cannot belong to a hedge knight. On her seventeenth name day, her father binds her future to Prince Aerion Targaryen, the cruel dragon prince, and the night Duncan learns the truth, he disappears without a word. Years later, at a great tourney in Ashford Meadow, Y/N sees a towering hedge knight enter the lists-Ser Duncan the Tall. The boy she saved. The man she loved. The ghost she thought she'd lost forever. And some loves, once awakened, are far more dangerous than war.

Because some loves never die.

They only wait...
for the moment they can destroy everything.