(W) Ann M. Martin, Gabriela Epstein (A/CA) Gabriela Epstein. Jessi recently moved to Stoneybrook and is one of the newest members of The Baby-sitters Club. She's getting ready to start regularly sitting for the BSC's newest charge* Matt Braddock. Matt has been Deaf since birth and uses sign language to communicate* so Jessi has to use it* too. It's a secret language! Soon all the neighborhood kids want to learn how to sign* which keeps the BSC busy. Jessi's the busiest of all she's preparing for her dance school's big show* plus working on another secret* just for Matt. Will Jessi be able to keep the secret and pull off her performance?