Daughter of Wolves and Lions

When Lily was 5 years old she was kidnapped. She was rescued by Eddard Stark and taken in as his daughter. Now 22 years old and no memory of her birth family she joins the Nights Watch with her brother Jon. Not long after joining the Nights Watch she finds out she is Tyrion Lannisters sister. Tyrion and Jon make a pack to keep Lily's identity a secret from Cersi for Lily's safety.