Daisy and Tom Buchanan are united in their love of money as she agrees to marry Tom after he gives her a pearl necklace worth $350,000 (this necklace would be worth a little over $4 million nowadays).
At one point in Fitzgerald's novel, Jay Gatsby describes Daisy's voice as "full of money." In Chapter Four Nick relates to the reader the tale of Daisy's marriage to Tom Buchanan. It seems Jordan was a bridesmaid in Daisy and Tom's wedding. About thirty minutes before the bridal dinner, Jordan checked on Daisy, who was lying on her bed, "as lovely as the June night in her flowered dress--and as drunk as a monkey." In her hand she held a letter; in the waste basket there was the resplendent string of pearls. In her slurred voice, Daisy told Jordan,
"Take 'em downstairs and give 'em back to whoever they belong to. Tell 'em all Daisy's change' her mine. Say 'Daisy's change' her mine!'"
Jordan summoned Daisy's maid, who put her into a cold bath. All the time that she was in there, Daisy clung to the letter. Finally, when it was so soaked that it fell into pieces in the bath, Daisy relinquished it. Nevertheless, thirty minutes later, Daisy was dressed and wearing the pearls, retrieved from the waste basket, and "the incident was over." The next day at five o'clock Daisy married Tom "without so much as a shiver."
Daisy and Tom live under one roof for many reasons, but the biggest reason is money. Daisy was in love with Gatsby, but it was a childish affair in her mind and he was going off to war anyway. She found Tom, who had money and was able to take care of her, and she jumped on it. Even though Tom has had a previous affair and is currently in an affair with Myrtle, Daisy sees him as her rock and her rock or foundation in money. She does not think or realize that she can get by without his money. Also, they have added a child into this mix which solidifies their lives together in both of their eves.