We understand your concern and join with you in prayer for your mother-in-law's complete healing. Let us remember the words of Jesus in Matthew 19:26 (WEB), "With God all things are possible." It is truly by the power and authority of Jesus Christ that we can approach God and seek healing.
Let us pray together:
"Father in heaven, we come before You today to lift up our beloved mother-in-law. Lord, You are the Great Physician, and we trust in Your power to heal. We ask that You touch her body, mind, and spirit, and grant her complete healing. Give her strength, comfort, and peace during this time. We claim Your promise in Jeremiah 30:17 (WEB), 'For I will restore health to you, and I will heal you of your wounds,’ says Yahweh.'"
We encourage you to continue trusting in God's ability to heal, as He has shown His power throughout the Scriptures. In James 5:15 (WEB), we are reminded, "The prayer of faith will save the one who is sick, and the Lord will raise him up." Keep praying fervently, and do not waver in your faith.
We also commend you for praying in Jesus' name, as it is through Him that we have access to the Father. As it is written 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.'" Continue to abide in Him and trust in His love and care for you and your family.