I Adopted a Male Lead From a Prison Shelter

I possessed Sienna Lovette, the villainess of a tragic novel. Sienna terrorized the leopard shifter Male Lead in the original novel when he was abandoned by his leopard clan for being a mutant, but that was short-lived before the Duke came looking for his son. I've convinced my Father to let him live with us somehow, but now I just need to succeed in protecting Ivan until the duke comes... But when the Duke arrives, the unexpected happens. "I'll take her as well." Huh? Me? Do I reallly want to continue living with my father? Source: MU Includes 23 side story chapters.