The power of a praying husband is not a means of gaining control over your wife. We all know that never really happens anyway. That’s because God doesn’t want us controlling other people. He wants us to let Him control us. When we humble ourselves before God and let Him control us, then He can work through us. God wants to work through you as an instrument of His power as you intercede for your wife.
The power in your prayer is God’s. When you pray for your wife, you are inviting God to exercise His power in her life. Your prayer enables her to better hear God’s voice and respond to God’s leading. In spite of that, however, God will never override a person’s strong will. If anyone is determined to live outside of God’s will, He will let that person do it. He who finds a wife finds a good thing; and obtains favor from the Lord. Proverbs 18:22