As Min heard about the poison, she looked shocked. Then she started to tear up and cry "But I didn't do anything bad. I just wanted to have fun. Please don't kill me I'd do anything." It was all an act, she wasn't sure if there was actual poison on the splinter, but she wanted to be sure. The only that might have gave it away was her tail, but unless the elf was an expert on her kind, it wouldn't matter.