A couple swapping battle of continuous vaginal ejaculation! The wife... tells the other man's husband to "come quickly" and gets 100,000 yen for each ejaculation she makes with a pounding cowgirl! The husband... aims for the prize money and has to endure ejaculation, saying "I'm not going to cum inside him!" He gets very excited seeing his partner cheating on him for the first time and gets a total of 16 genuine ejaculations!