Watch: Duck Dynasty's Jessica Robertson Announces 18-Year-Old Daughter Priscilla Is PregnantPriscilla Robertson is embracing a new chapter: motherhood. A month after Jessica Robertson-who also shares Lily, 22, Merrit, 20, River, 16, and Gus, 9, with Jep Robertson-revealed that her 19-year-old is pregnant, the teenager showed off her growing baby bump online. "Once upon a time a boy loved a girl," Priscilla wrote in an August 14 Instagram photo, alongside a mirror selfie in which she wore a crop top that accentuated her bump. "Now they are about to love someone even more.