After I Died, My Mother, Who Thought I Was Stupid, Regretted It

My mother is a strong woman, but I am very stupid. I can only get 30 or 40 points in every exam. For this reason, she was very angry: "I'm so stupid, how could I have a daughter like you." She didn't know that I really died, but she was stupid to death. Not long after my death, she adopted another adopted daughter. My adopted daughter is very smart and ranks first in her grade in all subjects. My mother was very happy and regarded her as her pride, and never mentioned that she had a daughter in front of outsiders. When someone mentioned me quietly, she would get furious: "That's not my daughter, my daughter is not that stupid." She proudly hugged her adopted daughter and announced in public: "This is my only daughter, and she is also my pride." What she didn't even know was that this girl was my father's illegitimate daughter and the culprit who killed me.