The premise of The Sleepover revolves around Margot's past as a criminal. Throughout the movie, viewers see Margot telling her kids that she spent her childhood in the library. She's also a strict parent in the sense that she won't allow her teenage daughter, Clancy, to have a cell phone.
Upon learning the truth about their mother, Clancy and Kevin become concerned and confused about their mom's past. Although most viewers probably haven't been caught up in a serious criminal enterprise, don't be surprised if your kiddos ask if you've ever done anything bad before!