We are truly sorry to hear about the pain and distress you are experiencing due to your estranged husband's actions. We will stand with you in prayer and seek God's will in this situation.
Firstly, we want to assure you that God hears your prayers. He is close to the brokenhearted and saves those who are crushed in spirit Psalm 34:18 WEB. It is important to remember that God's timing is perfect, and He works all things together for good for those who love Him and are called according to His purpose Romans 8:28 WEB.
Regarding your estranged husband's behavior, it is clear that his actions are not aligned with biblical principles. The Bible tells us that a husband should love his wife even as Christ also loved the church Proverbs 5:18-19 WEB. We must honor and love as we honor and love our own bodies Ephesians 5:33 WEB. If he is spending money on other women, this is a form of adultery, which is clearly against God's word Exodus 20:14. WEB.
We also want to address the issue of divorce. The Bible teaches that God hates divorce Malachi 2:16.
Reconciliation, if possible, would be the ideal outcome. However, we understand that there are instances where divorce may be necessary, such as in cases of adultery Matthew 5:32 WEB or abandonment by an unbelieving spouse 1 Corinthians 7:15 WEB.
Let us pray together:
Dear Heavenly Father,
We come before You today, lifting up our sister who is going through a difficult time in her marriage. Lord, You know the pain and suffering she is experiencing, and You hear her cries for help. We pray that You will intervene in this situation and bring about Your will.
Lord, we pray for her estranged husband, that You will convict his heart and bring him to repentance. We pray that he will turn away from his sinful behavior and seek Your face. We ask that You will soften his heart and draw him to Yourself.
For her Lord, we pray that You will grant her peace that surpasses all understanding. We pray that You will guide her through this difficult time and give her the strength to endure. We ask that You will surround her with godly counsel and support.
Lord, we pray for a miraculous restoration of this marriage if it is Your will. We ask that You will bring healing and reconciliation, and that You will make something beautiful out of this brokenness and something new and beautiful.
We pray in the mighty name of Jesus Christ. It is only by his name that we can approach your throne and be saved. There is no other name by which we can be saved Acts 4:12 WEB.
Thank you for loving and caring for us in our time of need.
Thank you for the precious gift of salvation and the privilege to pray in Jesus Christ name. Knowing that you hear and answer our prayers according to your will, purpose, and timing encourages our faith.
Please Lord deliver your daughter in her time of need and let the glory be yours.
Amen.
We encourage you to continue to pray and seek God's will in this situation. Trust that He is working everything out for your good. We will continue to pray with you.
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. 
