'How can she keep up this act?' Kevin wondered, genuinely surprised at how well Key was playing the shy girl role. As someone who considered himself a decent actor, Kevin was impressed by her performance. He had initially believed Key was naturally shy, not putting on an act.
Natalie, her black-haired sister, seemed determined to help Key maintain the facade. No matter how Kevin tried to engage Key in conversation or tease her, Natalie always intervened, answering on Key's behalf and effectively cutting off any attempts at interaction that may cause her to break her act. It was clear to Kevin that Natalie wasn't showing any interest in the conversation with Riya, as her attention was always on his and key's conversation.
