We understand your concern and the challenging situation you're facing. Firstly, it's important to approach this matter with love, patience, and wisdom, as guided by scripture. Remember, We are told in Galatians 6:2, "Bear one anothers burdens, and so fulfill the law of Christ." Yet, it is understood also from John 15:12, "This is my commandment, that you love one another, even as I have loved you." This does not necessarily mean physically living together if the situation is unhealthy. It does mean to help where help is needed and keep peace in the relationship.
It's clear that you're feeling overwhelmed by the prospect of living with your sister-in-law, and it's okay with God for boundaries to established in kindness considering all aspects. It's commendable that you are looking after her in patience.
You can ask for respectful boundaries about living conditions with your neighbors whom you are called to love. We are told this in Matthew 22:39 "You shall love your neighbor as yourself." in presenting your desires and conditions. You can pray for her to have a living situation that meets her needs and that will not violate God's word, but you should not pray against your sister-in-law or attempt to manipulate her decisions as doing so can hinder the work of God by attempting to live in harmony and also peacefully with all in Romans 12:18, "If it is possible, as much as it is up to you, be at peace with all men."
Instead of trying to influence her decision, pray that God's will be done in her life and yours. Pray that He provides a solution that is beneficial for both of you. We will pray that God grants you wisdom and that His Holy Spirit will protect you and the sanctity of friendship and love that should exist in a family.
You can get further insight by reading Psalm 55:22, "Cast your burden on Yahweh, and he will sustain you. He will never allow the righteous to be moved." and 1 Peter 5:7, "Casting all your worries on him, because he cares for you."
Regarding your desire to live independently and take care of yourself, we encourage you to trust in God's provision and timing. Prayer alone does not get God's work done. Continue the good work as instructed in Colossians 3:23, "Whatever you do, work heartily, as for the Lord, and not for men." Plan and work towards your goal, but also surrender your plans to God's will and be surprised by the blessings you encounter. Matthew 6:33 can give some guidance where this is stated, "But seek first Gods Kingdom, and his righteousness; and all these things will be given to you as well."
Let's pray together:
"Father in heaven, we come before You in the name of Jesus, lifting up our sister who is facing a difficult situation. We pray for Your wisdom and guidance in her life.
We pray for Your will to be done in the lives of both and that no bad feelings and actions are continued in this difficulty.
Help our sister to make decisions that honor You and bring peace to her life. We also pray for her sister-in-law, that You would provide for her needs and guide her path in Jesus Christ. We ask that You grant our sister the desire.
We pray our sister can live independently.
And take care of herself as she plans.
Give her the strength, resources, and wisdom to achieve this goal with the prayer she has set. We ask all of this in Jesus Christ our Lord. Amen and thank you Lord for Your everlasting salvation through Your word and Jesus Christ.
Articles:
Let's lift up our fellow members in prayer! @Nomoric needs peace for his family, @Pysuoland and his wife need a miracle for their visa, and @Valoermar's dad is in surgery today. Let's pray for them in Jesus' name! 
Khaeliinhold:
**Prayer Updates!** 
@Nymiorad needs prayers against recurring fire dreams and for divine direction.
@Wrierunwick requests protection for their daughter from spiritual attacks.
@Nomoric asks for peace and unity in their family this year.
@Anonymous seeks miracles for good sleep, rest, and divine intervention.
Let's lift up these needs in Jesus' Name! @Antitypogeo needs prayers for job protection, @Sceusoreurhold for Peg Fisher's recovery, and @Nymiorad seeks divine direction. Let's also pray for @Wrierunwick's daughter, @Nomoric's family peace, and miracles for @Anonymous. 
Share your prayers!
