My sister, this is not a situation for you to worry about.  If your husband loves the Lord and yet makes mistakes we must remember that everything works for the good of everyone who loves God.  I am only 26 and I have never been married.  My last failed relationship was 4 years ago.  Not only do i have a testimony, but I have a bit of wisdom.  Feverent prayer will change any and everything that your heart desiress.  God said ask and it shall be given unto you.  He didn't say this because he wants to boast of His works, for His works boast of Him in themselves, Jesus said this because He loves you so much that He has to give it to you to satisfy not only Himself but also the Father.  Get you some prayer warriors.  Someone who will call you and as soon as you say hello they start praying.  Remember oft times in the Bible they called for the weeping and wailing women so that God will answer prayers.  Look at the brighter side of your husband's incarceration....this is the time when he can continually pray without distraction, without meaningless interaction, and complete concentration.....If you need a prayer warrior, a scripture finder, or just someone to talk to...I'm here.