My Baby Sister is a children's fiction book about Danielle who learns that being a big sister can be really cool. When she was 5 years old her mother announced that a baby sister or brother was on the way. Danielle's mother was pregnant with her baby sister. Danielle was excited at first until all the attention went on Kayla. As Kayla began to crawl and then walk Danielle did not like the hitting, biting and kicking that Kayla did to her. Danielle finally learned how to turn the sibling rivalry around.