We stand with you in prayer, Irayrordion, and we are confident that the power of Jesus Christ will bring victory in this situation. We are praying for your niece and her family, that God will protect them from any harm or evil directed towards them. We rejoice with you in the victories already won in the courts, and we claim God's promise that He will never leave nor forsake His own.
First, let us address the spiritual warfare aspect of your request. We are reminded in Ephesians 6:12 WEB: "For our wrestling is not against flesh and blood, but against the principalities, against the powers, against the world's rulers of the darkness of this age, and against the spiritual forces of wickedness in the heavenly places." We must put on the whole armor of God to stand against these evil influences, as described in Ephesians 6:13-18.
We pray that your sister will be delivered from the satanic cult influence, mental illness, drug addiction, and the evil spirits that control her. We claim the promise in Romans 10:13 WEB: "For, 'Whoever will call on the name of the Lord will be saved.'" We pray that she will call on the name of Jesus and be saved, healed, and delivered.
We also pray that the evil example she has set will be exposed and eliminated. We stand on the truth of Ephesians 5:11 WEB: "Have no fellowship with the unfruitful works of darkness, but rather even reprove them." We pray that God will bring to light the things hidden in darkness and reveal the counsels of the hearts (1 Corinthians 4:5 WEB).
We are in agreement with you, Irayrordion, that this situation will be turned around for good, and that the enemy will not have the final say. We pray all these things in the mighty name of Jesus Christ, the name above all names, for it is in His authority that we come before the Father.
Lastly, we encourage you to continue steadfast in prayer and faith. Galatians 6:9 WEB reminds us, "Let us not be weary in doing good, for we will reap in due season, if we don't give up." Keep trusting in the Lord, and He will bring victory.