With the due date near, Jinger and Jeremy get ready to meet baby Vuolo; John whisks Abbie away on a surprise trip to ask for her hand in marriage; Jinger's labor takes an unexpected turn.

The hills are alive for Josiah and Lauren as they go on their Austrian honeymoon; while there, they re-enact scenes from "The Sound of Music" and visit with a local family; Jinger worries she won't have the smooth labor she was hoping for.

Jinger and Jeremy get a dose of reality as they adjust to life as new parents; Ben tutors the Duggar kids and they must use their math skills to cook a meal for 40 people; later at dinner, one couple makes a special announcement.

Jessa, Lauren, Kendra and Jana pair off with some of the little kids and go head to head to create a groom's cake for John and Abbie's wedding; Josiah and Lauren's worlds are shaken up when they reveal some tragic news.

In Laredo, Jeremy is on daddy duty as Jinger runs errands. Meanwhile, John & Abbie's wedding is just around the corner! John and the boys partake in a thrilling competition while Abbie tries on wedding dresses. Will Abbie be able to find "the one?"

John David and Abbie fly to the Philippines for a mission trip weeks before their wedding; Jinger and Jeremy travel up north so Felicity can meet her great-grandparents; while there, they get a surprise from some very unexpected guests.

John and Abbie's wedding is finally here and everyone is in full wedding-mode as they get ready for the big day; at the altar, the bride and groom share their first kiss in an unexpected way; a family member has a very special announcement.