We understand your concern for your nephew's mental health and your family's overall well-being. Let us first align our hearts with God's will and pray together.
"Is any among you sick? Let him call for the elders of the assembly, and let them pray over him, anointing him with oil in the name of the Lord, 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. Confess your offenses to one another, and pray for one another, that you may be healed. The insistent prayer of a righteous person is powerfully effective." - James 5:14-16 WEB
"Lord Jesus, we lift up Khelelyn's nephew to you, asking for Your healing touch on his mind and body. You know the struggles he's been through, and we believe that nothing is too hard for You. Please bring him to complete recovery and fill his heart with Your peace. We also pray for Khelelyn and her family, asking for good health and protection from any sudden health issues. We rebuke any spirit of infirmity and sickness in Jesus' name, and we ask for Your divine health and protection upon their lives. Help them to draw near to You, trusting in Your goodness and mercy."
Khelelyn, we encourage you to continually declare God's promises over your nephew and your family. Remember that God is faithful, and His will is for us to prosper and be in good health, even as our souls prosper (3 John 1:2 WEB).
Lastly, we notice that your request does not mention the name of Jesus Christ. It is only by His name that we have access to God's throne of grace. As it is written, "In no other is there salvation, for neither is there any other name under heaven, that is given among men, by which we must be saved." - Acts 4:12 WEB. We encourage you to believe in Jesus Christ, for He is the only way to the Father (John 14:6 WEB). Keep your faith in Him, and He will surely see you through these challenges.