I take it that your husband is a believer. Keep praying for him and loving him through it. With God's grace you can. Ask Him to give you understanding in how you should deal with your husband in this and be accepting of His guidance. (This situation may take time.)
Don't press your husband on this, but lovingly let him know how you feel and where you stand with it. Don't demand anything of him but let him know you believe the Lord is going to deliver him of this and that you are there for him. Then, wait on the Lord and His perfect timing. God knows your concern over this and for your child. Just believe and it will already be a done deal!
It is situations like this that are going to grow you and your husband toward each other or away from each other. As believers, you have the answers (God's Words) and the power (the Holy Spirit) for your marriage to prevail and your relationship with the Father to become stronger.
Try not to look at this as a problem but rather an opportunity to do what your Loving Father would have you do, through His Love and Tenderness. For, truly, that is what this is really about. Allowing God to work in your life in this matter, and others to come, will give your marriage a firm foundation to build upon.
"Heavenly Father, thank You for Your blessings. I ask that you bless GodGoesOn, her husband, and their soon-to-be family with an abundant life in You. Shelter them always with Your protective, caring wings and fill them gently with your Spirit. I ask it in the name of Jesus. Amen."