Kizzy betrayed Missy Anne
Missy Anne taught Kizzy how to read, and then Kizzy uses this against her by forging the travel pass for Noah. Missy Anne had a right to be mad. Missy Anne kept her promise to Kizzy. She told Kizzy that she would never tell anyone that Kizzy could read, and she didn't. Kizzy revealed it by her actions. Then she cries for Missy Anne to help her. She did it to herself. She also got Missy Anne in hot water because Dr. Reynolds knew that it had to be Missy Anne who taught Kizzy to read and write.
Kizzy screwed herself. Missy Anne was not to blame. I think that Missy Anne really liked Kizzy. She was so excited to have Kizzy come live with her. Kizzy would have had a much better life with Missy Anne than she did with Tom Moore. Whatever Missy Anne did for fun, etc., Kizzy could have enjoyed too. Missy Anne was going to give Kizzy the best life that a slave could have. Missy Anne had a right to be mad. Kizzy betrayed her by revealing their secret and using it against her.