The Alpha's Substitute Luna

Elena Rodriguez was originally the only daughter of the powerful Alpha Gael of the red moon pack until her parents died mysteriously when she was just 10 years old. She was left in the care of her father's brother who took over the pack, Alpha Blake and his wife Diana together with their daughter Monica.
Because they concluded she was the reason for her parents mysterious death, they turned her into a slave, and was maltreated all the time.

Until, the ruthless but handsome Alpha Xander of the blue moon pack ask to mate with Monica, Alpha Blake's daughter. Knowing fully well how ruthless and heartless Alpha Xander can be, they decided to give out Elena as a substitute to the ruthless Alpha Xander.