Big Sister Babysitter - I'm going to be a WHAT? ! by Lysne Nolte. Exuberant fourth grader, Lake Ashley Payton (also known as LA) and her blended family live on a beautiful and peaceful island. One day LA is informed that her mother is going to have a baby. This life changing news rattles her world and she fears the worst. LA captures every moment to make a video diary and uses Bible verses to help her through the emotional struggles. She becomes curious and learns the process of a baby's development and when her new sibling arrives, something happens that teaches her many lessons about being a big sister.