Treb sits down with her back against the wall and she lets her long hair fall to cover her face as she burries her face in her kneels to hide her silent tears. She was thinking back to the time when she had the chance to save her younger sister but was told by her sister to leave her trapped in their house (which had been caught on fire) to die. Being stuck in the little shelter was making her think of how her sister must've felt the night she died.