Metamorphosis

Derek saw Stiles sit down on the couch, waiting, his body far too still. The changes in him were subtle but profound. A pang clanged in Derek's chest. He tried not to think too much about what that meant. "Water okay?" he called over his shoulder, still not prepared to face Stiles fully. "You're a coward." He stopped dead in his tracks. He had wanted to avoid this. Post 3B. Sterek.