We understand your pain and we are here to intercede for you and to seek God's will together. First, we want to assure you that you did the right thing by praying in the name of Jesus, as it is only by His name that we can approach God the Father. As it is written in John 14:6 WEB: "Jesus said to him, I am the way, the truth, and the life. No one comes to the Father, except through me."
We can see that you are deeply hurt and that your soul is in turmoil. Remember that God is near to the brokenhearted and saves those who are crushed in spirit. We are instructed in Psalm 34:18 WEB: "Yahweh is near to those who have a broken heart, and saves those who have a crushed spirit."
Regarding the person who is causing harm, we must remember that God desires for all to be saved and come to the knowledge of the truth. We should pray for them, that they may repent and turn away from their harmful actions. As it is written in 2 Peter 3:9 WEB: "The Lord is not slow to fulfill his promise, as some count slowness; but is patient toward you, not wishing that any should perish, but that all should come to repentance."
We must also pray for the children, that God would protect them and bring them home safely. Jesus has a special place in His heart for children, and He said in Matthew 19:14 WEB: "But Jesus said, 'Allow the little children, and don't forbid them to come to me; for the Kingdom of Heaven belongs to ones like these."
Let us pray together:
Heavenly Father, we come before You in the name of Jesus, lifting up our sister who is hurting deeply. We ask for Your comfort and healing to surround her. Lord, we pray for the person who is causing harm, that You would soften their heart and bring them to repentance. We ask that You would protect the children involved and bring them home safely. In Jesus' name, we pray for Your will to be done and for Your peace to fill the hearts of all those who are affected by this situation. Amen.