The Question and Answer section for The Glass Castle is a great resource to ask questions, find answers, and discuss the novel.
Billy Deel was a very troubled young man. He was labeled a "juvenile delinquent," and had been known to torture and kill animals, steal, and vandalize the property of others. The Walls children were not sociopathic like Billy.
Are you referring to the Walls children reacting to the rape of Jeannette?
Grandma Smith’s strictness is partly to blame for Rose Mary’s lenient and flexible parenting style.