It’s bad enough that Gabby’s dad is dating, but when she discovers that his new girlfriend Natasha is actually Miss Bell, the super strict new teacher at school, Gabby is horrified! To make things even worse, she gets her first period, and she’s far too embarrassed to tell anyone. Gabby is determined to make sure Miss Bell does NOT become her new stepmum. But maybe there’s room for one more in her family after all?