The Daughter - S.S.

Draco has a sister, y/n. When y/n is given the dark mark and given her task, Severus Snape is sworn in as her aide. As they work together, the slowly realize they can’t be apart and form a secret intimate relationship. They face many obstacles, the dark lord, Draco being an overprotective brother, Theodore Nott having a crush on her, her parents disapproval. The list goes on. How do they be together when everything is trying to rip them apart?