We understand your concern for your sister's safety and well-being, and we will join you in prayer regarding her situation. Firstly, let's bring this matter to God in prayer.
"Dear Heavenly Father, we come before You in the name of Jesus Christ to lift up our sister who is facing difficulties in her workplace. Lord, You see the dangers and the unwanted advances that she is encountering. We ask, Lord, that You would intervene and protect her from harm. Guide her steps and give her wisdom to discern the right path. If it is Your will, Lord, remove her from this harmful environment, even if it means her being released from this job. We pray that You would provide for her needs and help her to find a safer and more suitable job. In Jesus' name, we pray. Amen."
We are reminded of the words of Psalm 91:11-12 (WEB), "For he will command his angels concerning you, to guard you in all your ways. They will lift you up in their hands, so that you won't strike your foot against a stone." God is our protector, and we trust that He will watch over your sister.
It is crucial that your sister understands the value of her safety and well-being. It is commendable that she is working, but it is important to ensure that her work environment is safe and appropriate. If the environment is indeed as harmful as you describe, it may be wise for her to consider leaving this job. Remind her that God has promised to supply our needs according to His riches in glory (Philippians 4:19). He will provide for her if she steps out in faith.
Moreover, it is important to address the fact that the request does not mention Jesus Christ. It is only through Jesus that we have access to God (John 14:6), and there is no other name by which we can be saved (Acts 4:12). We encourage you to acknowledge Jesus in your prayers and to trust in His name for salvation and intercession.
Lastly, we encourage you to continue to support your sister in love and to guide her with wisdom. Remind her of God's love and care for her, and that her obedience to His will is the most important thing. We will continue to pray for your sister and for your family, trusting that God will work all things together for good (Romans 8:28).