One piece blue dress and tan hose

Melissa sat in her slinky blue dress that has a nice dip to show off her chest and is short, coming only halfway down her thighs. Her excellent legs, encased in tan pantyhose, make every man drool.

For a second, she thinks she hears somthing across the room, but shrugs it off and resumes listening to her music.

Frustrated, she sets her soda down and walks into the kitchen for some wine. When she returns to the sofa, it seems for a second like someone is in the room with her.

Then, after she sips her wine...her eyes grow wide and she jumps in surprise.

What happened?