As Billie sets the ritzy luncheon table, Jimmy makes one last attempt to appease her ("Do, Do, Do"). But Billie will have none of it. As the luncheon begins, Cookie and Duke frantically serve the luncheon guests, and the Duchess continues to annoy Cookie, who spikes her lemonade with Gin. Billie entertains them all with a cockney song ("Hangin' Around With You") which mainly serves as an excuse to keep pouring hot soup on Jimmy's lap. But Billie accidentally pours some steaming soup onto Eileen, who immediately fires her. The Duchess, now happily drunk, defends Billie and reveals a deep secret as she grabs onto Cookie, climbs on the luncheon table and swings from a chandelier ("Looking for a Boy"). After he drags off the Duchess, an angry Jimmy calls Billie a common criminal, and they realize that they can never be together. Jimmy goes to prepare for his wedding, as Jeannie enters looking for Duke, who Billie accidentally reveals isn't a real duke. Jeannie is furious, so Duke tries to win her over with a poem ("Blah Blah Blah"), but Jeannie rushes away. In the ritzy bedroom, Cookie is dressing Jimmy for his wedding as Billie enters to return his wallet. Jimmy and Billie both realize that this is the last time they'll ever see each other ("Will You Remember Me?"). The Chorus Girls and Vice Squad set up the wedding ("I've Got To Be There - Reprise"). As Senator Evergreen presides, Eileen makes her very grand entrance ("I've Got a Crush on You"). But just before vows are exchanged, Cookie and Duke rush in, pretending to be Prohibition Agents, though Chief Berry quickly enters and reveals their true identities. As they're arrested, Jeannie rushes in and proclaims her love for Duke, then the now sober Duchess proclaims her love for Cookie. Still, Senator Evergreen insists the bootleggers must be arrested, but Jimmy's mother, Millicent, makes an appearance, revealing the true nature of her son's heritage – Senator Evergreen is Jimmy's father. The senator proclaims the day a joyous one and all are free to pursue their new and surprising loves. Jimmy realizes that Billie has rushed to the boathouse to sail away forever, and he rushes to swear his devotion to her. Millicent follows and reveals that she happens to be the biggest rum-runner on Long Island, and she'd like Billie to marry her son and take over her business.