We understand that you are going through a tremendously challenging time, and our hearts go out to you. Let's bring your situation before the Lord in prayer and seek His guidance and comfort.
Firstly, we notice that Jesus is not directly mentioned in the request. It is only through the name of Jesus that we have access to God the Father. There is no other name by which we can be saved, so we will pray this in Jesus' name. As it says in John 14:6 WEB Jesus said to him, I am the way, the truth, and the life. No one comes to the Father, except through me. Also in 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.
In times of difficulty, we are encouraged by God's word to cast all our anxieties on Him, because He cares for us. Let's pray together:
Heavenly Father,
We come before You in the name of Jesus, lifting up our sister who is going through a trying time. Lord, You know the heaviness in her heart due to her brother's behavior, her father's health, and her mother's condition. We pray that You intervene in her brother's life, soften his heart, and bring him to his senses. May he be cooperative, kind, and understanding, putting away all coldness, arrogance, and manipulative behaviors. As it speaks in Colossians 3:8 WEB But now you also put away all these: anger, wrath, malice, slander, and shameful speaking out of your mouth. Also, in Philippians 2:3 WEB doing nothing through rivalry or through conceit, but in humility, each counting others better than himself.
Lord, we also pray for her father's healing and comfort. May Your healing hand rest upon him, and may he feel Your peace and presence in his hospital room. In James 5:15 WEB and the prayer of faith will heal him who is sick, and the Lord will raise him up. If he has committed sins, he will be forgiven.
For her mother, we pray for clarity of mind and a willingness to address the issues at hand, including the inheritance matter. May she be open and honest, and may our sister find the strength and patience to continue helping her each day. As it speaks in Exodus 20:12 WEB Honor your father and your mother, that your days may be long in the land which Yahweh your God gives you.
Lord, we pray for our sister's exhaustion. May she find rest and renewal in You, and may Your yoke be easy and Your burden light upon her. As it says in Matthew 11:30 WEB For my yoke is easy, and my burden is light.
Lastly, Lord, we pray that through these trials, our sister may draw closer to You, finding comfort and strength in her relationship with You. May she know that You are always with her, and that You will never leave her nor forsake her as it says in Hebrews 13:5, WEB for he has said, I will in no way leave you, neither will I in any way forsake you.
We ask all these things in Jesus' name, trusting in His promise that if we ask anything according to His will, He hears us. And if we know that He hears us, whatever we ask, we know that we have the petitions which we have asked of Him 1 John 5:14-15 WEB.
As for the inheritance issue, we encourage you to trust in God's timing and provision. It is important to remember that our inheritance in Christ is far greater than any earthly wealth. As it says in 1 Peter 1:4 WEB to an inheritance incorruptible, and undefiled, and that doesn't fade away, reserved in Heaven for you.
In everything, continue to love and honor your parents, and trust that God is working in your situation. Remember that God's Word tells us to honor our father and mother, and that His commandments come with a promise. As it speaks in Ephesians 6:2-3 WEB Honor your father and mother, which is the first commandment with promise.
We encourage you to lean on other Christians during this time. The body of Christ is there to support and uplift each other in times of need. As it says in Galatians 6:2 WEB Bear one anothers burdens, and so fulfill the law of Christ.
Lastly, remember that God is always with you, and that He will never leave you nor forsake you. Trust in Him, and know that He is working all things together for your good. As it says in Romans 8:28 WEB We know that all things work together for good for those who love God, to those who are called according to his purpose.
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. 
