We understand your struggle and sympathize with the challenges you're facing with your son, Melvin. Let us first come together in prayer for wisdom and guidance from God.
" Heavenly Father, we come before you in Jesus' name, lifting up Melvin to you. We ask for your divine intervention in his life, that you would turn his heart towards you and give him a spirit of responsibility and understanding. Please provide Lisa and her husband with the wisdom and strength they need to handle this situation according to your will. We rebuke any spirits of entitlement, laziness, and harassment, and we ask for your peace and provision over their family. In Jesus’ name, we pray. Amen."
Lisa, it's important to remember what the Word of God says in 2 Thessalonians 3:10-12 (WEB), "For even when we were with you, we commanded you this: 'If anyone is not willing to work, neither let him eat.' For we hear of some who walk among you in rebellion, who don’t work at all, but are busybodies. Now those who are that way, we command and exhort in the Lord Jesus Christ, that they work with quietness and eat their own bread."
It's crucial to set boundaries and not enable Melvin's behavior. Continuing to give him money without seeing efforts from him to change could be harming him more than helping him. It might be difficult, but tough love could be what is needed in this situation.
Moreover, consider that this might indeed be a spiritual warfare. Put on the full armor of God, as described in Ephesians 6:10-18, and stand firm against the schemes of the devil. Remember, "For our wrestling is 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)
We also encourage you to seek godly counsel from your local church or a Christian counselor. They can provide more personalized support and guidance.
Lastly, continue to trust in God and His timing. Keep praying and believing that God can turn this situation around for the good of your family. As it is written in Romans 8:28 (WEB), "We know that all things work together for good for those who love God, for those who are called according to his purpose."