Her husband has been away from home on business for many years, so the two sisters-in-law in the movie are very lacking in love and their sexual needs are also increasing, so reluctantly, they use their student-age younger brother to help them. satisfy your desires. But they were also very wise in not taking the initiative in this matter, continuously performing many suggestive and arousing actions that caused their younger brother to arouse his untapped lustful nature, which they did. . Because she knows that only by doing so can she make her younger brother express his sexual ability to the fullest and this can make both of them achieve extreme pleasure. What a perfect plan.