The King's Substitute Bride

Serena Shaw loves Aidan Locke, but he hid his identity for her stepsister, Luna Shaw, mistakenly believing her his savior. Serena marries the comatose King of the North, Kaelan Kane, in a substitute marriage. She learns Kaelan is her childhood friend. Aidan Locke discovers the truth, begs forgiveness, but Serena cuts off their past. She marries Kaelan Kane. Aidan Locke is stripped of his heir title and exiled, living in regret.