What is Gatsby and Daisy's relationship?

Daisy Buchanan and Jay Gatsby are lovers in F. Scott Fitzgerald's "The Great Gatsby." The relationship between the two characters forms the primary plot of the novel.

Gatsby and Daisy have a relationship but are separated when Gatsby goes to war. When he returns to West Egg, he finds that Daisy has married Tom Buchanan. He befriends Daisy's cousin Nick and is reunited with her through him. Tom eventually discovers the affair between Gatsby and his wife and convinces her to return to him even though he himself is having an affair. In the aftermath, Daisy kills Tom's mistress, a crime for which Gatsby takes responsibility.