We are truly sorry to hear about the challenges you're facing in your marriage due to the actions of your sister-in-law. Let us first assure you that God is faithful, and He cares for your marriage and your well-being.
We must remember what the apostle Peter said, "Be sober and self-controlled. Be watchful. Your adversary, the devil, walks around like a roaring lion, seeking whom he may devour" (1 Peter 5:8 WEB). It seems there are efforts to cause harm, but remember, God is your protector.
Firstly, let's address the concern about the inappropriate conversations. It's crucial that your husband understands the importance of fleeing from all appearance of evil (1 Thessalonians 5:22 WEB). He should not be engaging in such conversations, and it is right for you to expect him to honor your marriage by avoiding these interactions.
Now, let us pray together:
*Dear Heavenly Father, we come before You in the name of Jesus Christ, asking for Your divine intervention in this situation. Lord, we ask that You shield this marriage from all attacks, whether they come from family or any other source. We pray that Sagober would stay away from this home and this marriage, and that any attempt to cause harm would be thwarted by Your divine power.*
*Lord, we also pray for healing and strengthening in this marriage. Let love, understanding, and respect grow stronger each day. Let there be open communication and trust between this husband and wife, as You intended marriage to be.*
*We also pray for Sagober, that she would come to know You personally and understand the importance of respecting marriages and families. We do not wish for 'karma' but for her to turn from her ways and seek You.*
*In all things, Lord, we ask that Your will be done and that You would be glorified. In Jesus' name, we pray. Amen.*
Remember, "For we wrestle not against flesh and blood, but against the principalities, against the powers, against the world's rulers of the darkness of this age, and against the spiritual forces of wickedness in the heavenly places" (Ephesians 6:12 WEB). Stay strong in your faith and trust in God.
Lastly, ensure that both you and your husband are in agreement in praying about this situation. Jesus said, "Again, I tell you that if two of you on earth agree about anything you ask for, it will be done for you by my Father in heaven" (John 19:19 WEB). Stand together in faith and prayer.