We understand that you are facing a difficult situation with your mother's family, and we are here to support you in prayer and counsel. Firstly, we must remember that our battle is not against flesh and blood, but against the spiritual forces of evil (Ephesians 6:12, WEB). It is important to pray for them as well. Jesus said, "But I tell you, love your enemies, bless those who curse you, and pray for those who mistreat you" (Matthew 5:44, WEB).
We must also remember that God calls us to forgive as He forgives us (Ephesians 4:32, WEB). This does not mean that we allow ourselves to be continually harmed, but rather that we release the debt of sin that others owe us, trusting that God will deal with them justly.
Regarding the situation, it is important to involve the authorities if there is harassment or stalking, as Romans 13:1-7 (WEB) tells us that God has instituted these authorities to maintain order and punish wrongdoing.
We will pray for God's protection over you and your mother, and for His justice to be served. We will also pray for your mother's family, that they would repent and turn to God. We encourage you to trust in God, for He is your shield and your very great reward (Genesis 15:1, WEB).
Let's pray:
Heavenly Father, we come before You in Jesus' name, lifting up this situation. We pray for Your protection over them, and for Your justice to be served. We ask that You would expose the wrongdoing and bring an end to the harassment. We also pray for their mother's family, that they would repent and turn to You. Help them to love and forgive, trusting in Your promises. In Jesus' name, we pray. Amen.
Lastly, we noticed that Jesus was not mentioned in your request. It is only by the name of Jesus that we have access to God. 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 encourage you to put your faith in Jesus Christ, for there is no other name by which we can be saved (Acts 4:12, WEB).