The Cheat Queen Reads My Mind Every Test

My younger sister, Joey Crawford, and I have taken the exam 20 times in a row. Yet, our answer sheet shows the exact same answers every time.

No matter how fast I complete the exam, Joey is able to turn in her paper one second before me.

My homeroom teacher, Mr. Harris, has spoken with me three times regarding this matter. At the same time, I receive my first warning for cheating on the exams.

Whenever my classmates see me, they say to me, "Hey, cheater! You got busted this time, huh?"

The thing is, I've never even touched Joey's paper. How can our answers be exactly the same?