Just keep praying for your daughter -- and for the salvation of the "wife".
I am reminded of the last conversation I had with my girlhood best friend, who had fallen away from the church in young adulthood when she married a domineering secular guy. When in her 60s she had terminal cancer, I asked her what she thought would happen after she died; and of course she said, "You're just gone. That's all."
I said, "What if you're wrong? What if what you learned in Sunday School really was right, and your rejection of God will have eternal consequences? What if you don't get to say how it is, but there is a stronger force than you who will decide what happens to your soul?" At this point, tears were running down my face. "If there's a heaven, I don't want you to be missing from my eternal life, my friend!"
She said, "I'd go back to church, but my husband will kill me!"
To which I incredulously replied, "But you're already dying, girl! You've given up your religion for him for all these years. He can do this last thing for you, drive you to church."
Next I encountered them was at her funeral (we lived far apart). They both had formed a relationship with a church and pastor, and although her husband remained unconverted, he did arrange a beautiful, reverent Christian funeral for her that was very well attended.
I thanked him; and I thanked Him.
Thank you so much for your moving story. It has given me some encouragement.
I have a total of four daughters and currently all of them have fallen away. One is indeed married to such a man, she spent this past week posting that red gay marriage logo on her Facebook page. She has three children. Another is busy with a new boyfriend, but he was raised right and there may be hope there. Her two kids are believers. Another is becoming very aware that she needs to start her toddler in church. She has even requested we do something as a family on Sunday even though her sisters are already committed elsewhere. My prayers for them are constant. My gay daughter lives in DC; the two oldest grandkids visited them there last week. I know the reason they want the kids to visit them is partly to show them the city and partly to indoctrinate them. Thanks for your encouragement.