We understand that you're going through a challenging situation with your marriage, and we're here to pray and provide biblical guidance with you.
Firstly, let's pray:
Dear Heavenly Father, we come before you in the name of Jesus Christ, lifting up this marriage and this family that is being torn apart. Lord, you have established marriage to be a lifelong commitment between a man and a woman, and we pray for your will to be done in this situation. We pray for the wife who has left her husband and is currently being influenced by her controlling mother. We ask that you soften her heart and bring her to a place of repentance, guiding her back to her husband and her marriage covenant. We also pray for the husband, that you would grant him wisdom, patience, and strength during this trial. We rebuke any manipulation or control from the mother-in-law and ask that you would bring conviction to her heart as well. We pray for healing and restoration in this marriage, and we ask that your will be done in Jesus name we pray.
Now, let's address some biblical principles related to your situation. The Bible is clear that marriage is a lifelong commitment, and that a man and a woman become one flesh when they enter into this covenant. The only biblical reasons for divorce are adultery or abandonment by an unbelieving spouse (Matthew 5:32, 19:9, 1 Corinthians 7:15, WEB). It's important to fight for your marriage and seek reconciliation.
The Bible also teaches that we should honor our parents, but when a man and a woman enter into marriage, they are to leave their parents and cleave to one another (Ephesians 6:2, Genesis 2:24, WEB). It seems that in this situation, your wife is being influenced by her mother in a way that is harming your marriage. It's important to set boundaries and communicate that your wife's primary commitment should be to her marriage.
Regarding finances, the Bible teaches that we should be good stewards of the resources God has given us. It's concerning that your mother-in-law is draining your finances, and this is something that needs to be addressed (Proverbs 21:20, WEB).
Finally, it's important to note that the Bible teaches that a wife should respect her husband and that a husband should love his wife (Ephesians 5:33). The fact that your wife is removing her wedding ring and going out without it is a sign of disrespect and a lack of commitment to your marriage. This is something that needs to be addressed and prayed over.
We encourage you to continue praying and fighting for your marriage. Seek wise counsel from your pastor or other godly mentors in your life. Remember that God is faithful and that he desires for your marriage to be healed and restored (1 Corinthians 1:9, WEB).
As an encouragement we leave you with this. 1 John 5:14 WEB This is the confidence which we have before him, that, if we ask anything according to his will, he listens to us. Remember that in Jesus name we have access to God and that it is only by the name of Jesus that we can be saved. (John 14:6, Acts 4:12, 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. 
