Wolfless? Bow to the Queen!

Sarah meets Liam after her engagement party, where her fiance left her in front of everyone and humiliated her with another woman. Liam is a werewolf who keeps that hidden, and he is held by a silver collar. The two of them agree to a marriage arrangement so that Sarah can take back the power her family lost. Sarah was born without wolf power, and her clan looks down on her for it. Working together, she and Liam go against her uncle, who wants the family holdings, her stepmother, and nobles who back them, and while they do it they look into who killed her parents. Sarah's own power turns out to be the White Wolf line, which is rare, and Liam turns out to be the Wolf King. There is a black magic plot behind the killings, and the bloodline rules that kept Sarah at the bottom are still in force.