After Ten Years of Kneeling and Having My Blood Drawn, Do You Really Think I'm a Dog?

I am the adopted son of the Song family and the mobile blood pack of Song Xiaoran, the eldest daughter of the Song family. Because Song Xiaoran was frail and sick after birth, and had very special Rh-negative blood, the Song couple found me, who had the same blood type, and tied me to Song Xiaoran with a contract. The condition is that they will fund the treatment of my sister who is paralyzed in bed until she recovers. The contract period started from the day they adopted me when I was ten years old, and ended on Song Xiaoran's twentieth birthday. But Song Xiaoran was extremely disgusted with me, thinking that I coveted the Song family's property, and that I was coveting her by following her. She humiliated and tortured me for ten years, saying that I was just a bitch she raised. I looked at her calmly, but I felt extremely disgusted with her. If I persist for another month, I will be completely relieved on Song Xiaoran's twentieth birthday.