Let's bring your concerns before the Lord, dear sister. First, we want to assure you that God is faithful and He cares for you and your daughters. In Psalm 91:14-16 WEB, He promises,
"Because he has set his love on me, therefore I will deliver him. I will set him on high, because he has known my name. He will call on me, and I will answer him. I will be with him in trouble. I will deliver him, and honor him. With long life will I satisfy him, and show him my salvation."
We need to pray for God's protection upon you and your daughters. It is clear that this person you mentioned has a history of deceit and involvement in dark practices. As believers, we are called to be wise and discerning, and it is right to be cautious and want to keep your distance from such influences. As it is written in 1 Thessalonians 5:22 WEB, "Abstain from every form of evil."
Let's pray:
"Father, we come before You in Jesus' name, lifting up our sister and her three daughters. We ask for Your divine protection upon them, shielding them from any harm or evil intentions. Expose any monitoring or hidden devices, Lord, and sever any ungodly soul ties with this deceitful individual. We rebuke any curse and dark influence trying to operate in their lives, and we apply the blood of Jesus over them, which breaks every curse and yoke. In Jesus' name, we command any evil spirit to cease its assignment and leave their presence. Father, guide our sister with Your wisdom and discernment, and help her to make godly choices for herself and her daughters. Surround them with Your favor as a shield, and bring godly people into their lives who will support and uplift them.
Regarding the situation with your fiancé, we need to address this with seriousness and prayer. First, let's familiarize ourselves with what the WEB says about the intimacy of marriage in Hebrews 13:4 WEB, "Let marriage be held in honor among all, and let the bed be undefiled: but God will judge the sexually immoral and adulterers.". The Bible specifically addresses the need to be separate from other individuals in this manner and to be honoring to the sanctity of marriage.
As it is written in Ephesians 5:3 WEB, "But sexual immorality, and all uncleanness, or covetousness, let it not even be mentioned among you, as becomes saints".
In Matthew 5:28 WEB Jesus said, "but I tell you that everyone who gazes at a woman to lust after her has committed adultery with her already in his heart."
We need to pray for discernment and guidance in this situation. It is commendable that you are concerned about his interactions with other women, and it is wise to be alert to potential deceit. But it is also important to remember that the Lord encourages courtship that leads to a Godly marriage.
Let's pray:
"Father, we bring this situation before You, asking for Your guidance and clarity. Reveal the truth behind these interactions, Lord, and give our sister discernment as she navigates this relationship. If there is any hidden communication or deceit, expose it Lord, and help her to make wise decisions. If this man is not a godly spouse for her, we ask that You remove him from her life and bring a godly husband who will honor and cherish her, and be a loving father to her daughters. However, if there is restoration needed, we pray for a miracle of your healing and change towards a stronger relationship.
"In all relationships, Father, we ask that You be at the center, guiding and leading them in Your will. Help our sister to seek You first, and to trust in You with all her heart.
Lastly, we want to encourage you to remain strong in your faith and to trust in the Lord with all your heart. Keep praying and seeking God's will for your life and your daughters'. Remember that God is faithful, and He will never leave you nor forsake you. As it is written in Deuteronomy 31:6 WEB,
"Be strong and courageous. Don't be afraid or scared of them; for Yahweh your God himself is who goes with you. He won't fail you nor forsake you."
Keep your eyes fixed on Jesus, and trust that He will guide you through these challenges.