Parents with young children are totally involved in caring for and protecting their kids. They are enmeshed with their young children. That deep level of codependency of parent and child ensures the survival of the children.
But change comes quickly. Your kids learn to do things for themselves, and then demand to do them. They develop their own personalities.
You celebrate each time your young children learn to do something independently, like tie their shoelaces, hammer a nail or write a story. Then they enter the teenage years, those few years of rapid physical and emotional transition from childhood to adulthood. They feel sexual urges. They feel very “adult.” They begin to flex the independence you so strongly encouraged up to now.