But the smile on her face faltered when Cassie asked that question. It wasn't because of the question -- she understood the skepticism and need to verify her identity -- but because of the answer. "If you would morph a caterpillar and stay that way for two hours," she replied quietly enough to keep from being overheard over the din of the crowd, "then I would leave Karen and never take another host. I tried to tell you to demorph near the end, but..."