Sometimes things don't go exactly as we imagine them going. However, God is faithful. We must trust and hope in Him, looking to Him alone for the provision of the Good.
Parents and grandparents are in a unique position of impact on "their" children and grandchildren, who ultimately belong to God; they can always pray for, love, and serve them no matter what the relationship is like or how far away they live.
The parent/child relationship is another key relationship in which we're to honor Christ and order our lives around Him. The home is designed as a laboratory of learning and growth, a training ground for life.