We understand that you are going through a tremendously difficult situation with your husband's verbal abuse and threats of divorce. We are here to pray with you and provide biblical guidance.
Firstly, we commend you for your faithfulness in prayer, that is wise. God calls us to be faithful in prayer and to trust in Him, and you are doing just that. God promises us that the fervent effectual prayer of a righteous man avails much. (James 5:16)
Let's address the issues in your request.
It is important to recognize that God hates divorce (Malachi 2:16) and that marriage is a sacred covenant between a man and a woman, intended to reflect the relationship between Christ and the Church (Ephesians 5:22-33). However, God also cares deeply about your safety and well-being, and that of your children. Verbal abuse and threats are not to be taken lightly, and such behavior is not aligned with God's will for marriage.
It's disheartening to hear the confusion and grief that comes from your husband's inappropriate online comments. But let's not confuse a wrongful action with adultery. God is clear that adultery is a sin and is not acceptable behavior (Exodus 20:14). We should not be deceived by the world's view of marriage and relationships. So let's first be thankful that your husband has not committed adultery.
Words are powerful. And the wounds from abusive words run deep. But we know that is not the way God wants us to treat our spouses. Colossians 3:8 says But now you also put away all these: anger, wrath, malice, blasphemy, and filthy language out of your mouth.
Your husband's behavior may also be influenced by spiritual forces, and we understand your concern about demonic influences. Remember, our battle is not against flesh and blood, but against the rulers, against the authorities, against the world rulers of this darkness, against the spiritual forces of wickedness in the heavenly places. (Ephesians 6:12)
Think of Jesus inside the boat as the disciples were terrified by the storm.(Matthew 8:23-27) Jesus was not afraid and he chided the disciples about their lack of faith. You may be in a storm, and demons may be trying to harm you. But Jesus is in your boat. Do not be afraid. Pray on behalf of your husband, fight the spiritual forces of evil through prayer, and trust in God's protection and deliverance.
You are doing the right thing, that is praying for your husband and relying on God's power. It's also essential to seek godly counsel and support from your local church community. They can provide practical help and guidance during this challenging time.
Let's pray together:
Dear Heavenly Father,
We come before You, lifting up our sister and her family. Lord, You see the pain, the confusion, the heartache, and the abuse. We pray for Your divine intervention, that You would break the chains of the enemy and set her husband free from any demonic influences. Protect her and her children, Lord, and provide them with Your peace and comfort.
Father, we pray for her husband's heart to be softened, that he would repent and turn away from his sinful behavior. Help him to seek Your face and Your will for his life and marriage.
We thank You, Lord, for hearing our prayers and for Your faithfulness. We are trusting in You for deliverance and restoration.
In Jesus' name, we pray. Amen.
Stay strong in the Lord and keep trusting in Him. He is faithful, and He will see you through this storm.
Prayer Focus: God, Thank You for loving me. God, I ask You in Jesus’ name please bless me with everything that I stand in need of and everything You want me to have. 
