I Mistook My Husband on Our Wedding Night, and His Twin Brother Spoiled Me

On their wedding night, Gu Qingyin's husband runs away. Just as everyone is laughing at her, the groom returns. She looks at the handsome man, familiar yet a stranger, and shyly calls him "Darling." She has no idea that her husband has been replaced: her husband's long-presumed-dead twin brother has taken his place and married her?!