Jemma Ball is one of Veronica Fisher and Kevin Ball's twin daughters along with her sister Amy. Her first appearance was in season 4.
She and her twin sister begin preschool, but have to switch spots because there parents cant afford tuition for both. One of the twins even bring in a dildo from there parents collection.
Kev and Veronica's ruse of the twins is exposed when Amy points out Jemma to the teachers. However, rather than take it to court, Kev and V are given the option to avoid this by having Kev play the role as Jesus for their parade.