Nathan is head over heels for his girlfriend and invites her to Tennessee for the holidays! Will his new love interest feel overwhelmed, or right at home getting to know Nathan's very large family? Meanwhile, Katie bonds with her younger sisters by teaching them some hairstyling tips and dishing about her future plans with Travis! To celebrate Christmas, the family gathers outside the Bates house for fellowship and to take photos of their growing family! But this holiday celebration quickly turns into a triple gender reveal party! Are Gil and Kelly Jo prepared to have 18 grandkids in the near future?