In Chapter 4, Jordan reveals the origins of Gatsby and Daisy's love affair. She explains that Gatsby met Daisy when he was stationed at Camp Taylor, and they planned to marry when he returned. However, she was prevented from seeing him off, and soon after he left, Tom Buchanan came on the scene, and won Daisy's heart-through a $350,000 pearl necklace. On her wedding day, Daisy receives a letter from Gatsby, and nearly calls the entire marriage off. Money triumphs over love though, and soon after their honeymoon Tom begins his series of affairs that will continue until the time of the novel. Daisy wastes no thoughts on Gatsby until she reads his name in a newspaper years later; Gatsby, on the other hand, searches for Daisy's name or connections to her everywhere he goes.
Jordan knows this through her friendship with Daisy, begun when they were both teenagers. she knows the wedding details because she was a bridesmaid, and was present during Daisy's minor breakdown. This scene highlights Jordan's penchant for gossip, as well as further unveiling the truth behind Tom, Daisy, and Gatsby's personalities.