When any man and woman cohabit and bed together without marriage and one or the either is married to someone else, it is considered as an adulterous act. A consensual sexual act between two individuals who are not lawfully wedded to each other is Adultery.

What is legally considered cheating?

What is considered infidelity? The legal term for cheating on a spouse is often referred to as adultery. It is a voluntary relationship established between an individual who is married and someone who is not the individuals married partner without the partner knowing.