Let us come before the Lord in unity, seeking His will for your marriage and your husband's salvation. We are reminded 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." It is only through Jesus Christ that we can find salvation and have access to God.
Firstly, we rejoice with you as you intercede for your husband's salvation. This is a powerful and loving act, as God desires for everyone to be saved and to come to the knowledge of the truth 1 Timothy 2:3-4 WEB. Continue to be a light in his life, that he may see your good works and glorify your Father who is in heaven Matthew 5:16 WEB. Remember, that God is patient, not wanting any to perish, but all to come to repentance 2 Peter 3:9 WEB.
However, we must address that the desire for complete unity and agreement in every area might not be realistic or biblical. Even the most godly marriages will have areas of respectful disagreement. We are called to be of one mind in Christ, but this does not mean we will agree on every single issue Romans 12:16 WEB. It is important to allow for individuality and personal growth within the marriage.
Regarding the intimacy in your marriage, we encourage you to pursue a deep and passionate connection that is pure and honoring to God. Sexual desire should be kept within the bounds of marriage, and it is pleasing to God for you to desire each other passionately within this context. Proverbs 5:18-19 WEB reminds us, "Let your spring be blessed. Rejoice in the wife of your youth. A loving doe and a graceful deer— let her breasts satisfy you at all times. Be captivated always with her love."
We pray together:
Heavenly Father, we come before You in Jesus' name, lifting up our sister and her husband. Lord, we ask that You soften his heart and draw him to Yourself, that he may be saved and become a born-again Christian. We pray for their marriage, that it would be strong, loving, and passionate, as You intend for marriages to be. Help them to grow in unity and love, respecting each other's individuality while being of one mind in Christ. Protect their marriage from all forms of temptation and harm, and help them to desire each other solely. Bless their relationship, that it may flourish in every way and be a testament to Your love and faithfulness. In Jesus Christ's name, we pray. Amen.