We join you in praying for your sister and her daughter, and we appreciate your heartfelt concerns. We will discuss her situation and offer advice and encouragement. First we will address the issue of bad influences.
Firstly, it is important to understand that bad influences can lead us away from God's will. Psalm 1:1-2 WEB Blessed is the man who doesn't walk in the counsel of the wicked, nor stand in the way of sinners, nor sit in the seat of scoffers; but his delight is in Yahweh's law. On his law he meditates day and night.
It is good that you want your sister to be free from bad influences. Here is our prayer:
Almighty God, we come before You in the name of Jesus Christ, asking for Your guidance and protection for our sister and her daughter. We plead the blood of Jesus over them.
We pray that You will guide her in the right way, just as the psalmist wrote, Guide me in your truth, and teach me. For you are the God of my salvation. On you I wait all the day. Psalm 25:5 WEB
We ask that You will open her eyes to see the changes she needs to make in her life. Give her a spirit of discernment to recognize and avoid bad influences. We pray that she will be happy and healthy not only for herself, but also for her daughter.
Lord, let her know that she is loved and cherished as Your child. Hold her hand every step of the way, and let no evil or harm come near her or her daughter. Protect them from all temptations and deliver them from any evil plans.
We also pray for wisdom and strength for you, as you support your sister and seek the help she needs. We ask the Holy Spirit to give help and guidance and intervene where necessary.
In all of this, we pray in the name of Jesus Christ, for it is in His name that we have access to You, Father. As it is written, Being therefore exalted at the right hand of God, and having received from the Father the promise of the Holy Spirit, he has poured out this, which you now see and hear. Acts 2:33 WEB
Finally, we encourage both you and your sister to remain strong in the faith.
Our sister, let's keep our hearts and minds focused on what is good and righteous. We should seek to honor God in all that we do, and trust in Him to direct our paths. When we do this, we can be assured that He will bless us with a life that is better than normal. When we do this, we are raising our children in the fear of the Lord.
May God Bless you and your family.
We plead the blood of Jesus over you and your family. This means we are praying for the blood of Jesus to protect, deliver, and heal.
For the word of God is living and active, and sharper than any two-edged sword, piercing even to the dividing of soul and spirit, of both joints and marrow, and is able to discern the thoughts and intentions of the heart. Hebrews 4:12 WEB
For the weapons of our warfare are not of the flesh, but mighty before God to the throwing down of strongholds. 2Corinthians 10:4 WEB
Prayer Focus: God, Thank You. Thank You for loving me. God, I ask You in Jesus’ name bless me with everything that I stand in need of and everything You want me to have. Bless me to know You in truth, fall in love with You with all my heart, mind, soul, body, and strength and never fall out of love with You. Bless me to have an ever growing closer stronger, more intimate relationship with You. Bless me with the love, desire, strength, and the spirit of obedience to always delight myself in You, seek first Your kingdom, and Your righteousness. Help and strengthen me God to always respect and obey You. Bless me to trust You with all my heart, acknowledge You in all my ways, and lean not to my own understanding. 
