Felicity Lowell is part of the royal family. She was raised to be a queen. Every human being looked up to her and expected highly of her.
There was one thing that disgusted Felicity, she hated how her people enslaved vampires. She's disgusted by their hatred to these supernatural creatures, she promised herself that if she is crowned queen, she would wipe out all vampire slavery. She thought they deserved better.
What happens if things go the other way around? As soon as the vampires were free, they got hold of the humans. They were all helpless, they all became slaves. Vampires vowed to themselves that they would make humans go through what they experienced under their power.
Felicity Lowell, she became a slave to the King. In this story, the Queen shall never bow to her King.