Joanie invites her younger sister, Beverly, to stay at her house while she goes to college. In revenge, Judge Stevens invites four cousins to join the merry throng, much to Beverly's delight and Joan's distress.
Joan finds the dress that Judge Stevens hid for their neighbor's birthday celebration. Not realizing the expensive gown wasn't meant for her Joan makes drastic alterations which ruin it. Desperate to make up for her gaff, Joan agrees to bake the birthday cake for the party, which only makes matters worse.
Joan claims Brad is always trusting when Mabel's husband is suspicious of the attentions his wife receives from Dr. Salazar. When Joan is told a husband in love is jealous she goes all out to provoke Brad's emotions.