Even though she was still in love with Gatsby, Daisy most likely married Tom because she knew he could provide her with more material comforts. In Chapter 4 Jordan recounts how, the day before the wedding, she found Daisy drunk, sobbing, and clutching a letter. Daisy has thrown away a pearl necklace Tom gave her – a necklace that cost $350,000. Presumably, the letter is from Gatsby, who most likely has learned of the wedding and is begging Daisy to reconsider. While Tom has just given her an insanely expensive necklace, Gatsby is still a student, living abroad, and has yet to make his fortune. Daisy must know Tom will be far more likely to provide her with the lifestyle she’s accustomed to. Once Daisy takes a bath and calms down, she consents to marry Tom, and appears, initially at least, happy with her decision.