ADULTERY AND OTHER LAWS ARE CULTURAL AND ARE NOT NECESSARILY SINS
ADULTERY AND OTHER LAWS ARE CULTURAL AND SHARED RULES OF CONDUCT BUT THEY ARE NOT SINS JUST BECAUSE THEY ARE OUT OF ISRAEL
In theory laws are territorial, cultural, and tribal. What exist in another land doesn't apply to you if you are not within that jurisdiction. You have to understand legal reasoning, legal systems, legal institutions and not just scripture.
Egypt's murder laws do not pertain to you if you are not Egyptian or living in Egypt. The cultural laws of Egypt are not universally applied. Laws coming out of Israel's culture are not applied to other jurisdiction or to other people and countries because they are not universal laws. Murder and adultery laws of Israel do not apply to Africans if they were not written for Africa's jurisdictions. The Sabbath laws were from canonical laws ordered by Moses. No other countries or culture abided by them. They were not universal laws but cultural laws.
Any laws or commandments from another culture are not abiding unless you apply them. If your society adopts foreign laws they then become the laws of the land but not a sin. Slavery was the law of the land in Israel and was adopted in the US but completely autonomous.
That leads me to my conclusion. There are cultural laws in Israel pertaining to adultery. Adultery is not a universal law because it came from Moses, although it is adopted by many. It only pertains to you if it is in your heart or land. But, it is not a sin because it came out of Israel and it is their sin. It is just a cultural sin shared and adopted by a particular group of people. Those habits, beliefs, traditions, laws, etc that are shared by others are not universal sins.
In Utah, the adultery law only applies to the married party (the law states that "A married person commits adultery when he voluntarily has sexual intercourse with a person other than his spouse."). ... Adultery in Virginia is coming to an end in 2019, it is a crime in Virginia, persons in divorce proceedings may use the Fifth Amendment.