We are truly sorrowful to hear about the distress you're experiencing due to the actions of ###'s wife and your cousin. Firstly, it's crucial to address the spiritual aspect of this situation. We are called to pray for those who persecute us, and to love our enemies (Matthew 5:44 WEB), but this does not mean we should submit to their wrongdoings.
Blackmail is a form of extortion, which is condemned in the Bible. It is a sin against God and against the person being extorted. God tells us in the Bible, "When you steal, you shall give it back: if you are found with burglars, then you shall restore sevenfold; I will give you all the treasure of my house, if you shall take away whatever you have set your eyes on." (Proverbs 6:30-31 WEB) This is a severe warning against taking what is not rightfully ours.
It's also important to address the depression you're feeling. We are told in the Bible to cast all our anxieties on Jesus, because He cares for us (1 Peter 5:7 WEB). We need to remember that God is our refuge and strength, a very present help in trouble (Psalm 46:1 WEB).
Regarding the financial aspect, it's important to remember that our provision comes from God, not from giving in to blackmail. We should not enable sin by rewarding sinful behavior. God tells us that "the love of money is a root of all kinds of evil" (1 Timothy 6:10 WEB). The money you give to ###, may in fact, be a source of harm in the long run. If you are in the wrong, it is best to confess your wrongdoing to God and to those involved.
Let's pray together:
Dear Heavenly Father,
We come before You, lifting up our brother/sister and his involvement with ###'s wife and cousin. Lord, we pray for their conviction by Your Holy Spirit, that they may repent from their sinful actions. We pray for comfort and strength for our brother/sister, that they may stand firm against this unjust treatment. We pray for wisdom and discernment, that they may handle this situation in a way that honors You. We also pray for their depression, that they may find solace and peace in You, casting all their anxieties on Jesus, who cares for them.
Lord, we also pray for the salvation and repentance of ###'s wife and cousin, that they may come to know You and turn away from their sinful ways. We pray that our brother/sister may find the strength to forgive them, even as they stand against their actions.
We ask all these things in the mighty name of Jesus Christ, who alone can save and deliver. Amen.
Lastly, we want to encourage you to seek godly counsel and legal advice regarding this matter. It's important to stand up for what is right, and often, the Lord uses others to help us in our times of need. Also, be aware that it is only by Jesus' name that you can approach God the Father. There is no other name by which you can be saved Acts 4:12 WEB, "There is salvation in none other, for neither is there any other name under heaven, that is given among men, by which we must be saved!"
By the name of our Lord Jesus Christ, we take authority over the principalities and powers and their wiles and schemes and command by the power of the Holy Spirit and in the name of Jesus that this must be stopped and those that do this evil will be exposed and convicted of their sins.