forced bride of the vampire lord

When Hazel finally turned adult, her father did not think twice before selling her to the emperor of a mysterious land. The man was famous for killing all her brides in less than a week but Hazel had a deep will to survive.
From behaving crazy to a villainess, she would do anything that keeps her safe until she find a way to escape. But why is that the Evil Vampire Lord behaves so differently than the rumors she had heard. Did she even want to run away now?