It's nice to take in grandchildren.
Jack's daughter is a drug addict that is being forced to give up her children.
Jack wants to figure out what to do with his grandchildren.
Jack offers to take care of the children from now on.
Jack agrees to put the kids in an orphanage, because he doesn't want to look after them.
Jack's grandchildren are better taken care of, and they feel loved.
Jack's grandchildren are scared and don't have anyone they can trust.