We understand your concern for your daughter and commend you for bringing this situation to the Lord in prayer. It is clear that you desire for her to walk in God's will and to be surrounded by godly influences. We stand with you in prayer and offer the following guidance and encouragement.
Firstly, we commend you for praying in Jesus' name, as it is through Him that we have access to the Father (John 14:6, WEB). It is important to remember that God's will is for your daughter to live a life of purity and holiness, which includes fleeing from sexual immorality and not being unequally yoked with unbelievers (1 Corinthians 6:18, 2 Corinthians 6:14, WEB).
We must address that the young man and his mother encouraging your daughter to move in with him is not aligned with biblical principles. The Bible teaches us to avoid even the appearance of evil (1 Thessalonians 5:22, WEB), and living together outside of marriage falls into this category. We pray that the Lord will indeed block any plans for them to move in together and that He will convict their hearts of this sin.
We pray for your daughter, that the Lord will draw her heart closer to Him. May she seek His face and walk in His ways, according to Psalm 27:8 (WEB), "My heart says of you, 'Seek my face.' My heart seeks your face, LORD." We ask that God will help her to focus on her studies, her job, her family, and most importantly, her relationship with Him.
We pray for a godly spouse for your daughter, someone who loves the Lord, loves her, respects her, and cherishes her, as described in Ephesians 5:25-28 (WEB). We ask that the Lord will surround her with godly mentors and friendships that will encourage her in her walk with Christ.
We also pray for godly unity within your family, that the love of God will bind you together in perfect unity, as Colossians 3:14 (WEB) encourages, "But above all these things, walk in love, which is the bond of perfection."
Furthermore, we pray that the Lord will block any evil plots against your family and transform the lives of those who seek to harm you. May His love, peace, and protection fill your home.
Finally, we encourage you to continue to trust in the Lord and to guide your daughter in the way she should go. Proverbs 22:6 (WEB) tells us, "Train up a child in the way he should go, and when he is old he will not depart from it." Trust that the seeds of faith and wisdom you have planted in her life will bear fruit.
We pray all these things in Jesus' name. Amen.