Amy isn't supposed to be wearing big-girl panties, but she just couldn't resist the allure of feeling like an adult. Now Step-Mommy Sarah has caught her, and she's going to be punished for disobeying. Step-Mommy gives her a very thorough spanking until her bottom is red and she's learned her lesson, then puts her right back into diapers where she belongs. Once her punishment is over, Step-Mommy Sarah nurses Amy to calm her down and remind her of what a baby she really is.