Miles entered Ramses' abode without knowing what she was getting into. Ramses was a mysterious guy, and Miles was aware that there was something more to him than what meets the eye.
She took a job as a maid inside his mansion, and she discovered Ramses' dark and ghastly secret. When her life was put at stake because of that secret, Ramses saved her. What would Miles do if she needed to serve Ramses her whole life in exchange for saving her? She needed to live her life as a servant, and she needed to fully devote herself to him.
Miles agreed when she couldn't do anything, but there was another meaning of being a servant in Ramses' life. And Miles was not prepared for any of it.