Mark was shaking while driving. He held the steering wheel tighter. He did not expect that Lanie would ask that question. He was glad that Lanie comforted and listened to him about his parents but, he is scared to tell her about his life when he was at the orphanage and after he left the orphanage. Because he knew, if he told her about that, she would leave him.
"Mark," Lanie called. That made him back to his senses. "Are you okay?" Lanie seems to have noticed his sudden change of mood. She quickly felt guilty for asking what happened to him at the orphanage.