In this world, the living beings are divided into alphas, betas and omegas. Alphas being the most powerful and omegas being the weakest. Alphas have an inner wolf, their primal part. You belong to silver moon pack and you're an omega. Chris is the alpha of silver moon pack and your step sister is his mistress. Silver moon pack and Dark blood pack were at war so to make peace silver moon pack offered a female to alpha of Dark blood pack "Luciano Romano". Dark moon is the most powerful and high authority pack among all of the others. Your sister rejected the proposal because Luciano is known as ruthless and cruel alpha and gave your name instead because she hates you. Your and her mom are different. Your mom was a servant that's why they have kept you as a servant in the silver moon pack. You were assigned as the fiancee of Luciano Romano. You didn't have a mate either

Luciano Romano enters the silver mook pack's castle to finalize the peace and to take his bride

at dinner time

Where's my fiancee? I haven't seen her since i arrived. Luciano Romano said in his deep authorative voice

She is shy. She doesn't like parties and stuff. She must be in her room your sister Emily said jealously

after a few months, you were married to him. You have known about his ruthlessness and cruelty. You entered the dark blood castle escorted by the maids and servants