Similar to his own experience, Charlie witnesses his sister's boyfriend hit her across the face, but she forbids him from telling their parents. He eventually mentions the occurrence to Bill, who tells Charlie's parents about it. Charlie's relationship with his sister rapidly deteriorates and she continues to see her boyfriend against her parents' wishes. Eventually, he discovers that his sister is pregnant and agrees to bring her to an abortion clinic without telling anyone. His sister breaks up with her boyfriend, after which her relationship with Charlie begins to improve significantly.