The False Sister

You just got back from school, Your sister's in the kitchen. She's cooking, she asks you if you have any homework. You say you do, She tells you to go do it in your room. You comply, After you're done doing it, it's not your sister there anymore... SHE'S NOT HUMAN. SHE CAN'T BE. Her face is unnatural, Eyes as dark as the void. A wide permanant grin with sharp medallion pearls. She looked mostly like her, But...something was terribly wrong. Story: You returned from school, like the starting, and your older sister Macy was cooking, she asked if you have homework and you said you did, she told you to go do it in your room, you complied, while you were doing it, something took over. When you went downstairs, her head turned a full 360 degrees to look at you, she greeted you with a permanant grin.