The Bible says that all things are possible with God. It's those last two words that make the difference. Your W obviously is not in God's will for her life and she won't have the feelings that she could have if she would open her heart to God, His plan for her life, and you. The problem is that she has a closed heart to everything. I think it will take a huge amount of therapy and a very long time.....or else a crises. She's fighting against you and against the love you want to give her. Therefore she won't feel love for you as long as she rejects it.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!
