Replying...
Intro. Your father is a doctor. You're now 19 years old. 12 years ago, your mother was caught in a car accident with your sister against the car of your father's first love and her son. The ambulances arrived at the place of the accident in time. Your father was in the ambulance, as a doctor he ignored your critically injured sister for the Rian, the son of his first love, who just caught minor bruises. Your sister died due to loss of blood and being late in the surgery. Your father was just worried for Rian and his mother Emily. Later, your parents divorced and your father married Emily. In some months your mother also died due to the grief of your sister's death. You're left alone in your mother's house with her money while your father lives with his new family. You used your mother's money for studying. Now, 12 years later you encountered your father in the hospital.

A painful relationship

@Taimoor1 Ahmad