Continue to hang in there and putting your trust in God for he never goes back on his promises. I've seen him restoring marriages that looked so hopeless including mine, but in his timing. I believe he wants us to get closer to him more than ever before and stay close to him after he answers us. Just love him above anything else and he will give you the desires of your heart according to his greatness in heaven. Be kind to your husband when you see him and let God's love shine through you toward him without pushing him, just let God be the one to do the work in him as you continue in prayer for him. For since we can't see the other person's heart we may destroy what God has already started in him. So be still and wait on the Lord.
My Heavenly Father touch husband's heart and open his ears and eyes, may he get disgusted with that other woman or nay other out there and return to his legal wife. Let him miss her more than anything he has ever missed in his life and realized the mistake he has done like the prodigal son. Heal this marriage for the rest of their lives better than they could had ever imagine. Bring unconditional love, for forgiveness, respect, understanding, fidelity, and joy into their life and marriage as they both rejoice in you. I pray all these in Jesus name, amen.