We are truly sorry to hear about the struggles you are facing, and we are here to pray with you and provide biblical guidance. Firstly, it's important to acknowledge that God cares for you and your children deeply. We are reminded in Matthew 6:25-34 WEB:
"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 wear. 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? Which of you, by being anxious, can add one moment to his lifespan? Why are you anxious about clothing? Consider the lilies of the field, how they grow. They don't toil, neither do they spin, yet I tell you that even Solomon in all his glory was not dressed like one of these. But if God so clothes the grass of the field, which today exists, and tomorrow is thrown into the oven, won't he much more clothe you, you of little faith? Therefore don't be anxious, saying, 'What will we eat?', 'What will we drink?' or, 'With what will we be clothed?' For the Gentiles seek after all these things, for your heavenly Father knows that you need all these things. But seek first God's Kingdom, and his righteousness; and all these things will be given to you as well. Therefore don't be anxious for tomorrow, for tomorrow will be anxious for itself. Each day's own evil is sufficient."
In your situation, it's clear that there are significant financial and emotional challenges. It's crucial to remember that God is our provider, and He knows our needs. However, it's also important to address the spiritual and moral aspects of your situation.
Your husband's actions are not aligned with biblical principles. Marriage is a sacred covenant between a man and a woman, and adultery is clearly condemned in the Bible. In Matthew 5:32 WEB, Jesus said, "But I tell you that whoever divorces his wife, except for sexual immorality, makes her an adulteress; and whoever marries her when she is divorced commits adultery." We encourage you to pray for your husband, that God may convict him of his actions and bring him to repentance.
Regarding your financial needs, we pray that God will provide for you and your children. We also encourage you to seek godly counsel and wisdom in managing your finances. It may be beneficial to reach out to your local church or Christian community for support and guidance.
Let us pray together:
Dear Heavenly Father,
We come before You today, lifting up this sister in Christ who is in great need. Lord, You know her struggles and the challenges she faces. We ask that You provide for her and her children, that You may grant her the financial blessings she needs to meet their daily needs. Guide her with Your wisdom, and help her to make sound decisions regarding her finances.
Lord, we also pray for her husband. We ask that You convict his heart and bring him to repentance. Restore their marriage, Lord, and heal the brokenness in their family.
Father, we ask all these things in Jesus' name. Amen.
Prayer Focus: God, Thank You for loving me. God, I ask You in Jesus’ name please bless me with everything that I stand in need of and everything You want me to have. 
