We understand your concern and are here to pray and provide guidance based on biblical principles.
Firstly, we are reminded of Jesus' teaching in the Gospel of Matthew: Therefore I tell you, don't be anxious for your life: what you will eat, or what you will drink; nor yet for your body, what you will put on. Isn't life more than food and the body more than clothing? See the birds of the sky, that they don't sow, neither do they reap, nor gather into barns. Your heavenly Father feeds them. Aren't you of much more value than they? And which of you by being anxious, can add one moment to the span of his life? Seek first God's Kingdom, and his righteousness; and all these things will be added to you. Matthew 6:25, 6:26, 33 WEB
So we understand that if your boss is indeed withholding payment unjustly, God will provide. However, we should also be fair in our assessment of the situation. The Bible teaches us to be subject to our employers and to obey them in all things, remembering that our true master is Jesus Christ. Let as many servants as are under the yoke count their own masters worthy of all honor, so that the name of God and the teaching may not be blasphemed. Let those who have believing masters not be disrespectful to them because they are brothers, but rather serve them because those who partake of the benefit are believers and beloved. Teach and exhort these things. 1 Timothy 6:1-2 WEB
In terms of the spirit of jealousy and anger, we should pray for Hannah, but we should also remember that our battle is not against flesh and blood, but against the spiritual forces of wickedness in high places. For our wrestling is not against flesh and blood, but against the principalities, against the powers, against the world's rulers of the darkness of this age, against the spiritual hosts of wickedness in the heavenly places. Therefore put on the whole armor of God, that you may be able to withstand in the evil day, and having done all, to stand. Ephesians 6:12-13 WEB
Concerning Hannah's fiancé, it is important to note that the Bible teaches us to respect the institution of marriage. A good name is better than precious oil; and the day of death, than the day of one's birth. It is better to go to the house of mourning than to go to the house of feasting: for that is the end of all men, and the living should take this to heart. Ecclesiastes 7:1-2 WEB Remember we are to warn others and lift up each other in the Christian Faith. Thinking of the relationship, as mentioned it should be a courting relationship where Hannah should be looking for a husband rather than having a fiancé if there are already issues. In your comment the comment was made about Hannah's fiancé not being a good person and therefore we should also pray for their repentance and salvation, remembering that it is only by the name of Jesus that we can be saved. If there are indications of sexual immorality before or outside marriage, it should be discussed to resolve the issue and not have marriage go forward.
Let's pray:
Dear Heavenly Father,
We come before you today to lift up Hannah and Brenwen. We ask the intercession of Jesus Christ and it is only by His name that we come to You. We pray for a fair and just resolution to the work situation and Lord provide for Brenwen's needs as your child. We pray that the work may glorify You. We pray for wisdom, patience, and understanding. Let this be a lesson to further understand you are the provider and our reliance on an employer is really a reliance on you for our needs. Let your scriptures be a guide for life in working relationships.
We also pray for Hannah's fiancé, that they may come to know Jesus as their Lord and Savior and be convicted of any wrongdoing. We pray that the courtship may be in accordance to You, Lord. Let it be rooted in faith and righteousness, honor, and respect for one another and if necessary the relationship may be resolved by becoming married or separated.
Lord let your will be done and pray to understand your will for these requests. In the name of Jesus Christ. Amen.