Despite predictions that Eve Martin would not be able to hold onto her philandering husband for long, she and Tom have been married for two years. Eve's close friend Sally Smith is married to Tom's pal Tubby, who involves Tom in his latest scheme to play around behind their wives' backs. As part of their plan, the two appoint themselves as filmmakers and "audition" two young women, Cleo Del Rio and Bubbles. Though Tom is hesitant at first, after Tubby arranges a date with Cleo, they soon begin an illicit affair. Meanwhile, Sally suggests that she and Eve leave town for awhile in order to make their husbands miss and appreciate them more. As soon as Eve and Sally depart for Aguascalientes, Mexico, Tom and Tubby resume their philandering and invite the girls to Tom's house. While Tubby and Bubbles flirt, Tom takes Cleo aside and tells her that he loves his wife dearly and is only interested in the most discreet of trysts, one without any entanglements that might threaten his marriage. The gaiety is interrupted, however, when Tom's lawyer, Charley Miller, drops in and tells the men that the contract they signed to make a motion picture has left their assets unprotected if the picture goes beyond the planned budget. Tom and Tubby then take Charley's advice and safeguard their possessions by turning them over to their wives. They sign over all their stocks, bonds and checking accounts, hoping that Eve and Sally will remain ignorant of the transfer. After Charley leaves, some poolside merriment ensues, but is curtailed when the wives return unexpectedly because Eve has forgotten her bag. In the house, the women discover the papers that their husbands recently signed. On their way out, the wives discover Tubby in the pool with Bubbles playing "piggy wiggy" and Cleo waiting for Tom in one of their rooms. Eve and Sally make a hasty departure for Aguascalientes, but not before they clean out their husbands' bank accounts, leaving them broke. In Mexico, Eve and Sally happily squander their philandering husbands' money on bad bets. Later, Sally runs into an old college flame, Paul Perkins, who, along with his pal Hal Rogers, agrees to a double dinner date at Sally's bungalow. Just as the four are about to sit down to dinner, though, Tom and Tubby, who have also come to Mexico with Cleo and Bubbles, enter and discover that their wives have been "stepping out." The situation is soon reversed, however, when Eve and Sally discover Cleo and Bubbles in their husbands' bungalow, where, unbeknown to Tommy and Tubby, the girls have been waiting to blackmail them. All ends happily, though, when the husbands succeed in getting their wives back. They return home, and Tubby plays "piggy wiggy" with Sally.