We understand that this is a challenging situation for your daughter, and we will pray for her and offer some biblical guidance. Firstly, we must remember that God calls us to honor our parents, but also to set boundaries and live in peace with all people.
Let us pray:
Dear Heavenly Father,
We come before You today, lifting up our sister who is facing a difficult situation with her in-laws. Lord, You know the struggles she is facing, and we ask that You grant her wisdom and discernment in handling this situation if she is a Believer. Help her to set boundaries with love and respect, and to communicate effectively with her in-laws. We also pray that You will soften the hearts of her in-laws, that they may understand the burden they are placing on her and act accordingly. We ask for peace and harmony in her home.
Lord, we also pray for her husband, that he would step in and take responsibility for his parents, as Your word instructs us to leave our parents and cleave to our spouse. Help him to understand his role in this situation and to support his wife.
Father, we ask that You will guide them all according to Your will and in accordance with Your word. We pray this all In Jesus Name.
Now, let us consider some biblical principles. The Bible tells us to honor our father and mother, but it also tells us that when a man and a woman come together in marriage, they are to leave their father and mother and become one flesh. This means that their primary responsibility is to each other and their own family, not to their parents.
Ephesians 5:31 WEB "For this cause a man will leave his father and mother, and will be joined to his wife. Then the two will become one flesh."
Matthew 19:5 WEB "For this cause a man will leave his father and mother, and will be joined to his wife; and the two will become one flesh."
It is important for your daughter and her husband to set boundaries with his parents, and for him to take responsibility for them, not her. She needs to communicate this to her husband, and they need to present a united front to his parents.
It is also important for them to remember that they are to treat their in-laws with love and respect, even when setting boundaries.
1 Peter 3:8-9 WEB Finally, be all like-minded, compassionate, loving as brothers, tenderhearted, courteous, 9 not rendering evil for evil, or insult for insult; but instead blessing; knowing that to this were you called, that you may inherit a blessing.
Matthew 5:44-45 WEB "But I tell you, love your enemies, bless those who curse you, do good to those who hate you, and pray for those who mistreat you and persecute you, 45 that you may be children of your Father who is in heaven. For he makes his sun to rise on the evil and the good, and sends rain on the just and the unjust."
Finally, if your daughter has not already done so, she needs to make sure that she has accepted Jesus Christ as her Lord and Savior. It is only through Him that we have access to God the Father, and it is only through His name that we can be saved.
Acts 4:12 WEB "There is salvation in none other, for neither is there any other name under heaven, that is given among men, by which we must be saved!"
John 14:6-7 WEB Jesus said to him, "I am the way, the truth, and the life. No one comes to the Father, except through me. 7 If you had known me, you would have known my Father also. From now on, you know him, and have seen him."
If she has not accepted Jesus as her Savior, we encourage her to do so today. If she is not sure what this means, we would be happy to explain it further. Be sure to reach out and ask if you need us to explain it.
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. 
