"Oh." Sara said as she realized what the other Slytherin had said. Something in the way Clara spoke, the ease of her voice maybe, seemed to pacify Sara for a moment, though the burning in her eyes was still clearly their, but her body relaxed some.
"They don't." she stated and looked back to her book. "I was just concentrating." She lied, not knowing what else to do.
Looking up, she saw Clara grinning and knew, from various sources though mostly Daphne, that Clara was extremely smart and probably saw through her lie. "I'm hiding." she stated simply.