She could hear somebody walk by the cubicle door.
Jen still was not sure what had made her to do it. But here she was, almost naked inside a cubicle in the library. It was pretty secluded. The library had cubicles along the walls of the room for people to study in. They had half-doors that could be closed but had a feet gap above the floor. She had chosen one that faced an aisle towards the rear and had nobody in the neighboring cubicles.
She had wanted to come in today, a Sunday night, to study for her fast approaching tests. But somehow that had not happened. Sitting alone in her cubicle she felt extremely bored. That's when it struck her. She could feel a tingling sensation through her body while just thinking about it. And then she did it. She took off her t-shirt and the jeans she was wearing. Standing there only in her red bra and panties, she could feel the rush. In one quick motion she kicked the pile of clothes lying at her feet towards the door. They didn't go out but were close enough for anyone walking past to be able to see them owing to the gap between the door and the floor. The person will have no doubt as to the presence of a near naked person inside the cubicle.