Looking at her waistband, you get some very dirty ideas. 'I should enter them' you tell yourself. You're about to enter from the front, when you stop. 'That wouldn't be a good idea, she might see me'. Instead, you start climbing on the side of her waistband. Pretty soon, you're directly behind her, hanging on her waistband. Looking down, you see the indent her butt makes from within her camo pants. You're immediately turned on by this, and lift yourself over the waistband. Looking in, you see her black panties, with the top of her buttcrack protruding on top of her panties. You jump, sliding feet first into her buttcrack. You begin sliding slowly down her panties, deeper into her butt. Soon, your view is consumed entirely by her two butt cheeks.
'This is awesome!' You think, but you feel her change positions a little. You're frozen in fear, praying she hasn't found you. She just scratches her left cheek and continues reading. Looking down, you see her anus just below your feet. Lowering yourself, your feet slip, going directly into her anus. It starts pulling you in, and you begin freaking out. Fortunately for you, it stops at around chest height. But then a smell hits you, it's worse than anything you've smelled before. You nearly gag at it, realizing it's coming from her asshole.
Then you feel a slight sensation at your feet. All of a sudden, you feel air flow past you. She just did a silent but violent fart, and the smell is intoxicating. You endup unconscious due to the nasty smell, but you can still feel her movements. She just put away her book, and was standing up. She begins walking as you wake up slowly. 'Where's she going?' you ask yourself.