Zachary's little mistress

'She was intoxicated by him; too intoxicated that it started to taint her delicate soul'

...

Amelia Sunfield, princess of Scrollrealm was faced with a challenge. With her father's deteriorating health, she had to get married in a few weeks. Things could only get worse when she married a total stranger who she believed to be good.
Abused and mistreated by her new husband, Amelia had only one person to run to.. Zachary, her guard.

...
"Zach, I plead with you. Go from me, please. Darkness can never mix with light," Amelia murmured, looking into his dark eyes. She couldn't fathom the look he carried but it wasn't something she wanted to know. "You've sinned too much. You've killed innocent and guilty, Zachary. It isn't something I can overlook"
Zachary's face held no emotion beforehand; hearing her made him smile.

"Haven't you heard, Little mistress that darkness follows light? Remind yourself that, without darkness, there would be no more light.
No matter how dark things seem right now, stay by my side and I promise to protect you. I was created to do that, Little mistress," he replied and she sighed. His next words made a chill run down her spine and she became frigid instantly.
"I only need a cup of your blood daily"