Invasion

Morgan woke, without really knowing why. She was comfortable enough, everything was still and quiet, and yet... her heart was pounding, her eyes were darting around the room as if she could see in the dark. She couldn't, of course, only the dim shine of stars and the dull glow of the hallway light from beneath her door.
She closed her eyes, knowing that she could hear better with less input from her other senses. It was as if her ears were wiggling with effort, stretching and growing to catch every little sound. Distant traffic, her mother muttering in her sleep and her little brother snoring, a ticking clock - and the creak of the old floorboards of the stairs.
There's somebody in our home, she thought, panicked. Somebody who is not allowed.
Battered by the harsh winter winds, the tree outside her window tapped against the glass.