What reason does charles five for leaving home to go to knoxville?

Reasons that charles five for leaving home to go to knoxville:

A Visit to Grandmother is one of William Melvin Kelley' short story work. Dr Charles Dunford visits his mother's house at Knoxville along with his son Chig. As the story moves forward the readers are introduced with a incident where Dr Charles conveys his bitterness towards his mother. He always felt that his mother gave more love and care to GL Dunford, and this resulted in misunderstandings. Charles mother then said that she loves both her children equally and a mother can never discriminate between her children. Her love for Charles was no less than GL.