Bonnie was on the show to reveal to her estranged husband Shane a secret. She unexpectedly left Shane five years ago after a few months of marriage but they never divorced. She had not seen or talked to Shane in the five years since she left.
The secret was that she gave birth to a son named Cody after leaving Shane. He had told Bonnie when they got married he did not want children. Bonnie explained to Maury that Cody thinks Shane travels around the world for his job.
After seeing his wife for the first time in five years and hearing her secret. Shane took a DNA test which proved he was the father of Cody.