Jinger Duggar is mourning the loss of her "adopted Nana." The reality star, also known as Jinger Vuolo, took to Instagram on Tuesday and shared a touching tribute honoring her longtime friend. "Our dear adopted Nana went home to be with the Lord," captioned the 28-year-old in a photo of the pair sharing a sweet embrace. "She was the most selfless woman and gracious woman." "Nana taught me so many things—15 years of piano lessons, that Long John Silver’s is actually good, doing laundry can be fun, to be joyful in all circumstances, and that it’s better to serve than to be served," the "Counting On" alum shared.