You need to persevere in your prayer. The dictionary says to persist (as in an undertaking) in spite of difficulties. This means that no matter what your wife does, says, etc. do not stop praying. Bombard heaven with your prayer and God will answer. In really difficult times, I myself have thrown myself on the carpet and cried for 3 days and God answered. Do not give up. It is in times when we persevere that a cocoon becomes a butterfly. Good things take time to occur. Keep on praying. Your answer is coming. Amen.