Grace's Feelings at Dusk

Read the following excerpt from a contemporary novel:

“Though the sun dipped low on the horizon, the shadows of the tall pines stretched like fingers across the forest floor. Grace could feel the chill in the air wrapping around her as the evening approached. She glanced at her watch, noticing the time slipping away much faster than she had anticipated. It was almost as if the shadows were pulling her deeper into the woods, each one a reminder of what she feared might be waiting in the dark.”

Based on the passage, what does the author suggest about Grace's feelings as dusk approaches?