Q: How can I be firm about hating the sin but still be a loving and respectful wife to my husband?
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“But to you who are listening I say: Love your enemies, do good to those who hate you, bless those who curse you, pray for those who mistreat you.” Luke 6:27-28 NIV

The command to love applies even to enemies. Be firm by expressing love in all ways possible even when it is neither easy nor deserved.
STOP hating, maligning, slandering, talking about his offenses to other people who are not my biblical counselors; stop keeping record of wrongs; condemning, accusing, blaming, shaming, rejecting husband for his behaviour consistent with devil’s. If he manifests devilish behaviour, the demons have trapped him. Jesus defeats them; be as Christlike as you can be by the power of the Holy Spirit.

START OR GROW IN:
*Spiritual warfare By understanding, memorising, applying the weapons of warfare Eph 6:12-18.
*Forgive as God forgives you
*Apply love (1Cor 13 commands on love + Romans 12 verses on love)
*Bless [bless those who persecute you; on the contrary, serve like Jesus served the one who betrays Him (John 13) , fill their need (romans 12:14-21)
*Respect:
“However, let each man of you [without exception] love his wife as [being in a sense] his very own self; and let the wife see that she respects and reverences her husband [that she notices him, regards him, honors him, prefers him, venerates, and esteems him; and that she defers to him, praises him, and loves and admires him exceedingly]. [I Pet. 3:2.]” Ephesians 5:33 AMPC
Love:
“IF I [can] speak in the tongues of men and [even] of angels, but have not love (that reasoning, intentional, spiritual devotion such as is inspired by God’s love for and in us), I am only a noisy gong or a clanging cymbal. And if I have prophetic powers (the gift of interpreting the divine will and purpose), and understand all the secret truths and mysteries and possess all knowledge, and if I have [sufficient] faith so that I can remove mountains, but have not love (God’s love in me) I am nothing (a useless nobody). Even if I dole out all that I have [to the poor in providing] food, and if I surrender my body to be burned or in order that I may glory, but have not love (God’s love in me), I gain nothing. Love endures long and is patient and kind; love never is envious nor boils over with jealousy, is not boastful or vainglorious, does not display itself haughtily. It is not conceited (arrogant and inflated with pride); it is not rude (unmannerly) and does not act unbecomingly. Love (God’s love in us) does not insist on its own rights or its own way, for it is not self-seeking; it is not touchy or fretful or resentful; it takes no account of the evil done to it [it pays no attention to a suffered wrong]. It does not rejoice at injustice and unrighteousness, but rejoices when right and truth prevail.
Love never fails [never fades out or becomes obsolete or comes to an end]. As for prophecy (the gift of interpreting the divine will and purpose), it will be fulfilled and pass away; as for tongues, they will be destroyed and cease; as for knowledge, it will pass away [it will lose its value and be superseded by truth]. For our knowledge is fragmentary (incomplete and imperfect), and our prophecy (our teaching) is fragmentary (incomplete and imperfect). But when the complete and perfect (total) comes, the incomplete and imperfect will vanish away (become antiquated, void, and superseded). When I was a child, I talked like a child, I thought like a child, I reasoned like a child; now that I have become a man, I am done with childish ways and have put them aside. For now we are looking in a mirror that gives only a dim (blurred) reflection [of reality as in a riddle or enigma], but then [when perfection comes] we shall see in reality and face to face! Now I know in part (imperfectly), but then I shall know and understand fully and clearly, even in the same manner as I have been fully and clearly known and understood [by God]. And so faith, hope, love abide [faith–conviction and belief respecting man’s relation to God and divine things; hope–joyful and confident expectation of eternal salvation; love–true affection for God and man, growing out of God’s love for and in us], these three; but the greatest of these is love.”
1 Corinthians 13:1-6, 8-13 AMPC