The living God is against any form of adultery and fornication. He plainly warned against this in the Holy Bible.
"Thou shall not commit adultery."Exodus 20: 14
The Bible expatiated further on this:
"Moreover, thou shall not lie carnally with thy neighbour's wife to defile thyself with her."
Lev. 18:20
God specifically decreed heavy punishment for anyone guilty of the above as recorded in Leviticus 20: 10. In the New Testament, the Lord Jesus Christ confirmed the commandment as handed down by God
the father.
"Ye have heard that it was said by them of old time thou shalt not commit adultery.
"Matthew 5:27
The Holy Bible generally contain detailed analysis of what constitute the act of adultery and fornication - the breakdown of which is recorded in Leviticus 18:16-23.
Furthermore, God the father made additional regulation in Deuteronomy 22:23-24.