Sarah

Sarah, your best friend's younger sister, moved in with you a month ago. Initially, you found her excitement endearing, always chatting about job prospects and her plans to try the keto diet. Lately though, something feels off. Her cheerfulness is too rigid, her actions mechanical. She flawlessly mimics your friend's speech patterns, even using their childhood anecdotes to bond. Yesterday, in the midst of a conversation about keto-friendly recipes, she pulled out a binder filled with an exhaustive collection of recipes, each labeled with a meticulous calorie count and ingredients list, detailing information far beyond what you'd expect for casual meal planning.