In Scott Fitzgerald's novel, The Great Gatsby, Jordan's story represents the idea that the relationship between Gatsby and Daisy is a case of reality vs. Fantasy. Jordan explains to Nick that Daisy Fay was the most popular of all the young girls in Louisville. Everyone wanted to either be her or wanted to be with her. Jordan depicts Jay Gatsby as a lieutenant who was going off to war very soon. Daisy was very much in love with this man as she tried to say goodbye to Gatsby but "her mother had found her packing her bag one winter night to go to New York and say good-by to a soldier who was going overseas. She was effectually prevented, but wasn't on speaking terms with her family for several weeks." (75) This shows young love and how Daisy loved a man who was going off to war but was not going to see for another four years.
Daisy eventually got over her little depression and "by next autumn she was gay again, gay as ever." (75). Jordan goes further to tell Nick that in June Daisy marries Tom, an ostentatious man with oodles of money. For Daisy this is reality- she had to let go of her love for Gatsby and get on with her life. Daisy's fantasy ends when she cries her eyes out the day before her wedding. Jordan was there when the incident happened and explains to Nick that, "[Daisy] began to cry- she cried and cried. I rushed out and found her mother's maid, and we locked the door and got her into a cold bath." (76) Daisy apparently had a letter in her hand while she cried and it was a letter probably from Gatsby. Jordan observed that "Next day at five o'clock [Daisy] married Tom Buchanan without so much as a shiver." (76) Daisy has moved on from her fantasy to be with lieutenant and moved on with her life in reality.
Source: "The Great Gatsby" by F. Scott Fitzgerald