A man who always boasted that he made love to his wife three days a week suddenly finds his pride shattered. His close friend, tired of hearing the same stories, decides to go further and claim the same woman for himself. Over five consecutive days he takes her again and again, finishing inside her three or four times each session until the total reaches nineteen creampies. The married woman with a mature, voluptuous body slowly surrenders to the intense pleasure, her body trembling as the forbidden affair deepens. What began as a challenge turns into an all-consuming obsession that leaves both of them changed forever.