Katniss was momentarily distracted, and then swallowed. "Don't thank me. I just accidentally told the doctors you're not my brother." She leaned her head against his shoulder. "But they said I'll be able to see you when you're sick anyway, and I'll fight them if they don't."
After another moment, she added, "And Simon's on his way."
She knew that wasn't what he meant, but still, she felt guilty. Still coming down off the adrenaline of being attacked by the mountain lion, absorbed with worry about why Finnick was so cold that he'd practically died of hypothermia in a room that had felt perfectly comfortable to Katniss before she'd gotten under the blankets with him, she'd accidentally called him her friend. He was her friend, but he had called himself her brother, and she really had started to see him that way. She felt incredibly stupid for having slipped up on something so simple.