Dickey Betts and son Duane show how the song is played:
Hmm, I counted more than two fingers involved on the fret board.
Again according to Wiki:
Betts named the song after his daughter, Jessica Betts, who was an infant when the song was released. She had bounced along to the song's rhythm, and Betts attempted to capture her attitude with the song's melody. He invited fellow guitarist Les Dudek over to collaborate on the song, and Dudek formed the song's bridge. The song's arrangement was crafted in prior to recording the song, which took place at Capricorn Sound Studios in Macon, Georgia.