I hope you know that you have many people on the boards here at GT praying for you and your marriage. We have seen many hearts changed through prayer.
I also must admit, that I am especially praying for God to pierce your wife's heart and remove the hardness that is encircling it.
Having been a wife with a very hardened heart years ago and who withheld physical intimacy from my husband, I know how destructive my decisions were to my marriage.
The intimacy switch cannot be turned off as a Christian wife, with the full expectation that a husband will remain faithful and not leave the marriage because he is a Christian and knows God hates divorce. It develops deep frustration and anger. This is not the way God designed our marriages to be. When we hold the power over our sexuality, we become self-idols. The power does not belong in our hands, and when we place it there, we invite temptation into our marriage, sinful-selfishness, and spiritual sickness.
Please know, I earnestly continue to pray for your wives, your marriages, and that God holds you close and away from temptation. It is a difficult and terrible time for you. And, dear brothers, you are my heroes for standing strong for your marriages - even when the return is not seen right now. You are warriors... and even warriors have their doubts at times. God will bless you for hanging in there during these most difficult circumstances.
Love your wives, as Christ loves the church and lay down your lives for them. I am sure you strive to do this. God will honor you for your decisions - even the ones that have you biting your tongues some days. I know you are not perfect men, and I'm sure your wives would attest to that

, but work on falling deeply in love with God. Be passionate about him in all things that you do.
Pray, pray and pray some more. Be on your knees daily for your wives and for your marriage. Stand strong and fight against The Enemy.