If you dream of adultery, then you should be more quitter and keep secrets to yourself. If you only have a will to make an adultery, but do not do it, then you will deal with minor troubles in your life. If your wife commits adultery, then it shows your fear of losing her, or the fact that you do not trust her completely. However, the adultery in dreams shows your fear of being betrayed.
Read more about dreaming of Adultery in other dream meanings interpretations.