Adultery

To dream that you commit adultery or have an affair signifies your sexual urges and desires that are longing to be expressed. Alternatively, it indicates self-betrayal of your subconscious. You may find yourself entangled in a situation that is not in your best interest, perhaps even illegal. 

To dream that your mate, spouse, or significant other is cheating on you, highlights your insecurities and your fears of being abandoned. You feel that you are being taken for granted. You are lacking attention in the relationship or that he or she is being less affectionate. Alternatively, you feel that you are not measuring up to the expectations of others.

***Go to Common Dreams: Cheating Dreams for further analysis.