We understand your concern for your ### and the complex situation he is in. Firstly, we commend you for bringing this matter to prayer, as it is only by the name of Jesus Christ that we have access to God. It is written, For there is one God, and one mediator between God and men, the man Christ Jesus, who gave himself as a ransom for all; the testimony in its own times (1 Timothy 2:5-6 WEB).
We must also address the fact that your ### is living with a woman who is not his wife. This is considered fornication, which is sinful in God's eyes. The scripture clearly tells us to flee from sexual immorality. All other sins that a man commits are outside the body; but the sexually immoral person sins against his own body. Or don't you know that your body is a temple of the Holy Spirit who is in you, whom you have from God? You are not your own, for you were bought with a price. Therefore glorify God in your body and in your spirit, which are God's (1 Corinthians 6:18-20 WEB).
Moreover, the situation is further complicated by the mention of witchcraft. The Bible clearly condemns all forms of witchcraft and sorcery. There shall not be found with you anyone who makes his son or his daughter to pass through the fire, one who uses divination, one who practices sorcery, or an enchanter, or a sorcerer, or a charmer, or a consulter with a familiar spirit, or a wizard, or a necromancer. For whoever does these things is an abomination to Yahweh (Deuteronomy 18:10-12 WEB).
Let us pray together for this situation:
Dear Heavenly Father,
We come before You in the name of Jesus Christ, lifting up our ### and the complex situation he is in. Lord, we ask that You break the ungodly ties between him and the woman he is living with, and that You protect the inheritance that rightfully belongs to the family. We pray that the Holy Spirit will open our ###'s eyes and convict his heart according to scripture to agree with the basic salvation message of believing in Jesus Christ, so he can more clearly see the sinful nature of his current lifestyle and return to You, taking a stand for Jesus Christ and for a godly marriage with another Christian Believer if this is Your will, Lord.
We rebuke the evil forces at work in this situation. We are not unaware of the devil's schemes, and not to give place to the devil. We know that You, Lord, are greater than any power of darkness. Greater is he who is in you than he who is in the world (I John 4:4 WEB).
We pray for Your protection over our ### and the family's inheritance and also the siblings. We ask that You thwart the plots of this evil woman and her manipulative practices through witchcraft and spells. We believe in the power of Jesus' name to overcome all evil.
Lord, we also pray for this woman, that You would have mercy on her and bring her to repentance, delivering her from the evil she is involved in. May she find salvation in Jesus Christ.
We ask all these things in the precious name of Jesus Christ, who gave Himself as a ransom for all, the testimony in its own times.
Amen.
Be encouraged and steadfast in prayer. Continue to stand firm in your faith, knowing that God hears your prayers and is working in this situation. Trust in the Lord with all your heart, and don't lean on your own understanding. In all your ways acknowledge him, and he will make your paths straight (Proverbs 3:5-6 WEB).
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. 
