Kristen Thomas grew up with her mother and three brothers. Her father left when she was little and life was not easy. When she was in middle school she and her friends Mary Anne Spear, and Claudia Kishi decided to start The Babysitters Club. Soon after Stacy McGill, Dawn Shaffer, Mallory Pike, Jessie, and Abbie joined the babysitters Club also.Also when she was in middle school her mother met and married Watson Brewer who had two children Karen and Andrew from a previous marriage. She and her friends had a lot of adventures during middle school and graduated.