" Sarah!"- The 100 word horror story!

Sarah heard a light tapping on her window late one night. That week, it had happened three times, and every night it got louder. She looked out and saw nothing but the blackness and her own reflection in the glass. The tapping developed into scraping, followed by a whisper, “Let me in.” She trembled and locked all the doors and windows. The murmur became more intimate, originating from within the dwelling. Her heart thumping, she turned to face the mirror in her bedroom. There, in her reflection, appeared a dark figure with sunken eyes. Again with a smile, it whispered, "You already let me in." The lights momentarily flickered off.