Another daughter on the way?

My niece and I have been trying to get her girls' daddy to let Taylor (her oldest daughter) come to stay with us and go to school here. Taylor is 12 and going to a horrible school and is already saying she can't wait to turn 16 so she can quit. Of course we don't want that to happen. I called Taylor's daddy tonight and talked to him and he has agreed to let her come here. She will come home with us when we leave Louisiana on New Year's Day and we will bring her home after school is over in May. Then it will be up to her daddy if she goes back with us after the summer is over. He has agreed to this once before and changed his mind 5 minutes later. Hopefully he won't do that this time. I know he is going to miss her but Taylor has a learning disability that isn't being addressed in the school she is in. Our schools are MUCH better. So if all goes well, we will be bringing Taylor home with us after Christmas and starting her in school on the 3rd of January!

Please help us pray that God's will be done in this situation. I don't want to do anything out of the will of God. I want what is best for Taylor and God knows what that will be.