For now, let’s just stay on the surface. This is just the surface.
Let’s have a look at marriage. Let’s see it as God and His Church. It is represented in the marriage of God with man and woman.
Adultery against God—in both the spiritual and physical—begins in the mind. What mankind does against his spouse is primarily done against God. Man and woman are to cleave unto God. In this way they cleave to one another. Otherwise, both are detrimental to one’s salvation.
Violation in the least is sin against God. The same God says, “If ye love me keep my commandments” (John 14:15). He tells husbands to love their wives as Christ loves His Church. He lay His life down for her. Anything less, is hating God, one’s spouse, and one’s self, let alone others.
The vows made between husband and wife are first made by each to God in the presence of the three persons (God the Father, God the Son, and The Holy Spirit): the Godhead. The vows made unto God, surrendering one’s self, is the commitment made both to God and one another.
One who says they love their husband or wife, yet consistently chooses to disobey God by speaking falsely against their spouse, letting others curse and yell in anger at the spouse, speaking hatred toward him or her, practicing name calling, putting another in the spouse’s place or role, preferring others above the spouse, providing for others rather than the spouse, or seeking to degrade his or her spouse in the least: these do not love God. Neither do they love others, let alone themselves.
James 2:10-12 KJV
 For whosoever shall keep the whole law, and yet offend in one point, he is guilty of all.  For he that said, Do not commit adultery, said also, Do not kill. Now if thou commit no adultery, yet if thou kill, thou art become a transgressor of the law.  So speak ye, and so do, as they that shall be judged by the law of liberty.
1 Timothy 5:8 KJV
But if any provide not for his own, and specially for those of his own house, he hath denied the faith, and is worse than an infidel.
2 Corinthians 6:14-18 KJV
 Be ye not unequally yoked together with unbelievers: for what fellowship hath righteousness with unrighteousness? and what communion hath light with darkness?  And what concord hath Christ with Belial? or what part hath he that believeth with an infidel?  And what agreement hath the temple of God with idols? for ye are the temple of the living God; as God hath said, I will dwell in them, and walk in them; and I will be their God, and they shall be my people.  Wherefore come out from among them, and be ye separate, saith the Lord, and touch not the unclean thing ; and I will receive you,  And will be a Father unto you, and ye shall be my sons and daughters, saith the Lord Almighty.
Genesis 2:21-25 KJV
 And the Lord God caused a deep sleep to fall upon Adam, and he slept: and he took one of his ribs, and closed up the flesh instead thereof;  And the rib, which the Lord God had taken from man, made he a woman, and brought her unto the man.  And Adam said, This is now bone of my bones, and flesh of my flesh: she shall be called Woman, because she was taken out of Man.  Therefore shall a man leave his father and his mother, and shall cleave unto his wife: and they shall be one flesh.  And they were both naked.
Deuteronomy 4:4 KJV
But ye that did cleave unto the LORD your God are alive every one of you this day.
Deuteronomy 10:20 KJV
Thou shalt fear the LORD thy God; him shalt thou serve, and to him shalt thou cleave, and swear by his name.
Matthew 4:10-11 KJV
 Then saith Jesus unto him, Get thee hence, Satan: for it is written, Thou shalt worship the Lord thy God, and him only shalt thou serve.  Then the devil leaveth him, and, behold, angels came and ministered unto him.
Deuteronomy 11:22-23 KJV
 For if ye shall diligently keep all these commandments which I command you, to do them, to love the Lord your God, to walk in all his ways, and to cleave unto him;  Then will the LORD drive out all these nations from before you, and ye shall possess greater nations and mightier than yourselves.
Deuteronomy 13:4 KJV
 Ye shall walk after the Lord your God, and fear him, and keep his commandments, and obey his voice, and ye shall serve him, and cleave unto him.
Deuteronomy 30:19-20 KJV
 I call heaven and earth to record this day against you, that I have set before you life and death, blessing and cursing: therefore choose life, that both thou and thy seed may live:  That thou mayest love the LORD thy God, and that thou mayest obey his voice, and that thou mayest cleave unto him: for he is thy life, and the length of thy days: that thou mayest dwell in the land which the LORD sware unto thy fathers, to Abraham, to Isaac, and to Jacob, to give them.
Romans 12:9 KJV
Let love be without dissimulation. Abhor that which is evil; cleave to that which is good.
Exodus 34:14-16 KJV
 For thou shalt worship no other god: for the Lord, whose name is Jealous, is a jealous God:  Lest thou make a covenant with the inhabitants of the land, and they go a whoring after their gods, and do sacrifice unto their gods, and one call thee, and thou eat of his sacrifice;  And thou take of their daughters unto thy sons, and their daughters go a whoring after their gods, and make thy sons go a whoring after their gods.
John 14:15-21 KJV
 If ye love me, keep my commandments.  And I will pray the Father, and he shall give you another Comforter, that he may abide with you for ever;  Even the Spirit of truth; whom the world cannot receive, because it seeth him not, neither knoweth him: but ye know him; for he dwelleth with you, and shall be in you.  I will not leave you comfortless: I will come to you.  Yet a little while, and the world seeth me no more; but ye see me: because I live, ye shall live also.  At that day ye shall know that I am in my Father, and ye in me, and I in you.  He that hath my commandments, and keepeth them, he it is that loveth me: and he that loveth me shall be loved of my Father, and I will love him, and will manifest myself to him.
John 14:23-24 KJV
 Jesus answered and said unto him, If a man love me, he will keep my words: and my Father will love him, and we will come unto him, and make our abode with him.  He that loveth me not keepeth not my sayings: and the word which ye hear is not mine, but the Father’s which sent me.
Matthew 19:4-6 KJV
 And he answered and said unto them, Have ye not read, that he which made them at the beginning made them male and female,  And said, For this cause shall a man leave father and mother, and shall cleave to his wife: and they twain shall be one flesh?  Wherefore they are no more twain, but one flesh. What therefore God hath joined together, let not man put asunder.
Mark 10:7-9 KJV
 For this cause shall a man leave his father and mother, and cleave to his wife;  And they twain shall be one flesh: so then they are no more twain, but one flesh.  What therefore God hath joined together, let not man put asunder.
Exodus 20:5-6 KJV
 Thou shalt not bow down thyself to them, nor serve them: for I the Lord thy God am a jealous God, visiting the iniquity of the fathers upon the children unto the third and fourth generation of them that hate me;  And shewing mercy unto thousands of them that love me, and keep my commandments.
2 Corinthians 11:2 For I am jealous over you with godly jealousy: for I have espoused you to one husband, that I may present you as a chaste virgin to Christ.
Now go. Study these out and show thyself approved of God, rightly dividing the word of truth. Let that all sink in.