A father has two sons but one son, for whatever the reason decided he no longer wanted to be in fellowship with his family. But he did want the benefits of a fellowship. He wanted the financial
resources that would only come to him because he was his father's son. But he did not want the relationship with his family.
Often times, family members decide that they want to live independent of us because they don't want to have to come to terms with their decisions. The scripture says train up a child in the way that they should go. The sad thing is if we look at some people who identified themselves as Christian, it becomes more and more noticeable that there is no desire in them to be in relationship with Jesus, with the Father, or with the Holy Ghost. They want what they feel should come to them as a result of saying they're Christians.
Sometimes we have desires we want God to fulfill, even if we are living in rebellion to the word of God. When the desires manifest we'll say it's the blessing of God when it's the grace working in your life. Why grace and not blessing? God doesn't bless rebellion. It's the grace of God that's keeps all of us from being struck down, or receiving the judgment of God when we are operating in open rebellion.
So the son comes back home, and the family is restored because of the action of the father not necessarily because the action of the son. The restoration of the relationship was based on the actions of the father. God is the type of father who always is at a place where He wants the family to be restored. Grace has been so bountiful yet those who advertised themselves as Christians have abused it.
Commit yourself to the word of God. Intercede for those you know who are living a contrary life. Actually talk to them and urged them to live righteously before the Lord. It's just reasonable service that can result in a restored family.