The fourth installment of the popular Wife Laboratory, which exposes the pretenses and true feelings of wives around the world! Will a wife cheat even if she can see her husband in the next room, separated by a one-way mirror? He offers her money, seriously seduces her, and shows her his erect penis... Will the wife, who has been approached in every way possible, choose love for her husband? Or the temptation of money and penis? The whole story, right up to the shocking conclusion, has been captured on a hidden camera! A number of lewd acts of wives who are unaware of their husbands. Please enjoy!