I figured it out! The more that I think about the story, the more ways I come up with to improve it.
Have you ever read any of the Alex Cross books by James Patterson? I loved each and every one of those books and thought it was fascinating how he switched between the good guy and bad guy with such ease throughout the chapters.
I'm going to add chapters into the book from Jane's perspective. Surely, an older sister will react to situations differently. I think it will add more layers to the story and make it more interesting. That and I need to add more details overall.