Adultery, infidelity
See also: 
“You shall not commit adultery”[1] When a man commits adultery with his Neighbor's woman, they shall be put to death, the adulterous man as well as the adulterous woman…[2]
In "The Gospel as it was revealed to me"
- The rabbi said it and the scribe also: “The sterile woman is, in the house, a curse from God. You have the right and the duty to give her a deed of divorce and not to afflict your virility by depriving yourself of children.” I do what the Law says. - Jesus: “No. Listen. The Law says not to commit adultery, and you will commit it. The commandment given originally is that one and no other.”[3]
- “Not to desire another man’s Woman” is one with “not to commit adultery.” For desire always precedes action. Man is too weak to be able to desire without satisfying his desire.[4]
- As his mother desperately pleads with him, Jesus speaks to the young leprous debauched man who had an adulterous relationship with the young Woman of a client of his father. Jesus is sad: "And when you sinned, did you not think of your mother? You were mad enough to forget that you had a mother on earth and that there was a God in Heaven. And if the leprosy had not appeared, you would never have remembered that you offended God and your Neighbor? What have you done with your Soul... with your youth?" - "I was tempted..." - "Are you a child to not know that this fruit is cursed? You would deserve to die without my mercy."
(He still heals him of his leprosy). "I have accomplished the miracle because of this poor mother. But lust disgusts me to the point that I am revolted. You cried out in fear and disgust of leprosy. For Me, my Soul cried out in disgust of lust. All miseries surround me, and for all I am the Savior. But I prefer to touch a dead, a just man whose flesh is already decayed who was honest and at Peace with his spirit, rather than approach a lustful. I am the Savior, but I am the Innocent.
(...) I understand that you would want something else from Me. But I am unable. The ruin of a youth barely formed and destroyed by passion has disturbed me more than if I had touched Death. Let us go to the sick. Unable, because of the nausea that chokes me, to be the Word, I will be the Salvation of those who hope in Me. Peace be with you." In fact, Jesus is very pale, as if sick. He regains his smile only when he bends over children who are sick and the disabled lying on their stretchers. Then, he becomes Himself again (...)[5] - (...) The husband who goes to other loves is an assassin of his wife, of his children, of himself. The one who enters another's house to commit adultery is a despicable thief. Like the cuckoo he exploits the nest of another without paying. The one who betrays a friend’s trust is a forger, for he shows a friendship which in fact he does not have. One who acts thus dishonors himself and dishonors his parents. Can he then have God with him?[6]
- “And a Woman who prostitutes herself, what sin does she commit?” - “If she is married, she is guilty of adultery and theft against her husband. If she is unmarried, of impurity and theft against herself.”[7]
- Incest and adultery.[8]
- Every man who looks at another man’s Woman with desire has already committed adultery with her in his heart.[9]
- Those who do not love their companion with their Soul, their spirit, and their flesh, drive him to adultery. [...] I do not even want to stop at the all-too frequent case of your carnal unfaithfulness, which does not make you different from prostitutes, I speak of your moral unfaithfulness to the love pact sworn before my altar.[10]
- (John 8:1-11): They drag a Woman of about thirty years, disheveled, clothes in disorder, like a mistreated person, and in tears. They throw her at the feet of Jesus like a heap of rags or a dead wretch... “Master, this Woman was caught in adultery…”[11]
In other works of Maria Valtorta
Notebooks of 1943
Catechesis of September 25: Condemnation of adultery.
…Adulterous and cursed is he who, in an obscene comedy, lives two or more married lives, and returns to his spouse and his innocent children, the fever of sin in the blood and the smell of vice on his lying lips.[12]
Nothing makes adultery lawful. Nothing. Neither abandonment, nor the illness of the spouse, and even less his more or less [oGodx]. Most of the time, it is your lustful being that makes you see your companion or your spouse as [oGodx]. You want to see them as such to justify to yourself your shameful behavior blamed by your Conscience…[13]
In fundamental Christian texts
In the Bible
“You shall not commit adultery” (Exodus 20:14 - Deuteronomy 5:18) - When a man commits adultery with the Woman of his Neighbor, they shall be put to death, the adulterous man as well as the adulterous woman (Leviticus 20:10) - The eye of adultery spies at twilight. "No eye shall see me," he says and puts on a mask (Joel 24:15) - He who commits adultery with a Woman is a fool, he makes ruin of his life (Proverbs 6:32) - Such is the conduct of the Adulterous woman: she eats, wipes her mouth and says: "I have done nothing wrong!" (Proverbs 30:20)
In the Catechism of the Catholic Church
- The divorced who remarry civilly (CCC 1650).
- Every act directly willed is imputable to its author (CCC 1736).
- It is not permitted to do evil so that good may result from it (CCC 1756).
- The root of sin is in the Heart of man, in his free will (CCC 1853).
- Master, what good must I do to possess life eternal? (CCC 2052)
- Charity does no harm to the Neighbor (CCC 2196).
- Behold! I say to you: ‘Whoever looks at a Woman to desire has already committed, in his Heart, adultery with her' (CCC 2336)
- Offenses against the dignity of marriage (CCC 2380).
- The Purification of the Heart (CCC 2517).
- If we ask with a divided Heart, “adultery,” God cannot hear us (CCC 2737).