We are truly saddened to hear about the struggles your sister and her family are facing, and we are here to intercede and pray with you. The Bible tells us that "the effective, fervent prayer of a righteous person accomplishes much" (James 5:16 WEB).
Firstly, we want to remind you that God's will is for marriages to be strong and godly. As it is written, "Therefore what God has joined together, let no man separate" (Matthew 19:6 WEB). We pray that your sister and her husband will find their way back to each other and to God, as He is the only one who can truly mend their relationship.
Let us pray:
Dear Heavenly Father,
We come before You today, lifting up our sister's family to You. Lord, You see the pain and the threat to their marriage. We pray for Your divine intervention, that You would soften their hearts and turn them towards You and towards each other. Lord, we rebuke any evil influences that may be affecting their marriage, especially the husband. May Your light shine upon him and draw him close to You. Protect the mother and daughter, Lord, and grant them faith, safety, and peace. Cover their entire family with Your grace, mercy, and love. In Jesus Christ's precious name, we pray. Amen.
We also encourage you to stand firm in faith and believe that God can turn this situation around. Continue to pray for them and encourage them to seek God's will for their marriage. Remind them that "a cord of three strands is not quickly broken" (Ecclesiastes 4:12 WEB)—when God is at the center of their marriage, they can withstand any storm.
Lastly, we want to emphasize the power of praying in Jesus' name. It is only through Him that we have access to God's throne of grace. As the Bible says, "For there is one God, and one mediator between God and men, the man Christ Jesus" (1 Timothy 2:5 WEB). If you or your sister's family have not yet accepted Jesus Christ as your Lord and Savior, we encourage you to take that step of faith. It is only through believing in Him that we can be saved (Acts 4:12 WEB).