Disclaimer: This is a fantasy. I would never want someone to do this for real. If themes of humiliation, degradation, and bondage offend you, you may want to look elsewhere. But if that's your thing, feel free to enjoy! (Note: this story also contains scat. It's not a huge part, but it is there, so be warned.)
When Megan awoke, she found herself lying on the floor of a van, her lithe young body covered in dirt, scrapes, and bruises. She groaned and tried to move, only to find that she couldn't. Her arms were contorted behind her and bound tightly to her ankles, forcing her limbs up to form an "O." The bonds were so tight that they were nearly pulling her elbows and knees out of joint, and even her long blonde hair had been pulled back and tied to her big toes. Finally comprehending how bad her position was, she began to hyperventilate, her anxiety growing as she realized that not only was her slim body bound and entirely naked, but an enormous black baton had been shoved roughly up her anus.
"Oh God, oh God," she thought, "where the hell am I? I can't remember anything after leaving the bar..." She whimpered, feeling for the first time the enormous ball gag forcing her tiny jaws apart. It felt as large as a baseball to Megan, and she shook her head back and forth trying to dislodge it, but only succeeded in rubbing her chin across the huge puddle of drool and snot which had accumulated beneath her. She moaned around the ball, protesting this hideous situation, and heard a chuckle from the van's front seat.
"Sounds like the little blonde bitch is awake, Leslie." The voice was rough and masculine, laced with menace.
"Sounds like it, Tom," a woman replied, her tone surprisingly cultured, and a little familiar. "Sounds like the teasing little whore doesn't like it either." She chuckled. "College students are always the best. Can't ever seem to believe what's happening to them."
Megan groaned and tried to roll off of her tummy and onto her side, hoping to get a look at the couple driving. As she rocked back and forth, she realized that her bladder (and her bowels, for that matter,) were painfully full from her hours at the bar. She toppled over on her side and clenched her pussy muscles tight, trying not to piss herself like a baby. Tears of frustration and pain filled the corners of her eyes, but despite her best efforts her body betrayed her, and she soon felt her pee seeping out into a large puddle beneath her.
Leslie smelled the acrid piss and laughed. "Looks like the bitch pissed herself," she said, punching her companion in the arm. "I told you we should have diapered her before we left. Looks like you'll have a mess to clean up later Tom."
Tom grunted, a sour frown creeping over his face. "How was I supposed to know she couldn't hold it? Anyway, we can hose her down when we get her back to the warehouse with the other girls. She better not make any more of a mess though."
Leslie turned toward Megan's back and shouted, "Do you hear that, you filthy slut?! Keep the rest inside your diseased ass or you'll be sorry." She reached back and jiggled the baton, causing Megan to wince and yelp in pain, spit spewing from around her gag. Leslie laughed and shoved the baton in deeper. "That baton stays in, and so does your shit, understand whore?" Megan blushed and nodded, her anus puckering out around the thick black rod, tugging it in further despite her humiliation. She knew it was spreading her ass cheeks so wide that the woman could see everything between them; her face burned at the thought, but her pussy began to dribble, her unwilling exposure stirring something deep and primitive inside.
They drove for what seemed like hours, every bump jostling Megan. Her ass felt like someone had lit a handful of matches and stuffed them inside, and her stomach was hard and distended from the pressure deep in her bowels. She wondered how long she would be forced to hold it, and what terrible plans her captors had in store for her.
By the time the truck rolled to a stop, Megan was moaning in agony, both from the pain in her joints and her rigid, swollen tummy. Despite her reluctance, she had pissed herself several more times as the hours had crawled by, but the baton was lodged too firmly to push out. Her bowels screamed for release. It felt as though a battering ram was hammering against her anus from the inside, but the door was barred fast. Her dignity was so far gone, her pain so horrendous, that she would have licked her captors' boots if they would only allow her to relieve herself.
She head the driver's side door click open, followed by the crunch of heavy boots against gravel. Then the side door of the van slid open, revealing the moonlit night sky and Tom's ski-mask clad face. "Ugh, you smell like a litter box," he said, pinching his nose and fanning his other hand over her to disperse the stench. "Couldn't just hold it, could ya?" he muttered. "Stupid bitch. Hope ya like Pampers, cause I see a lot of 'em in your future." Megan blushed an even deeper shade of red and tried to hide her face against the van's floor, only to find her cheek resting in a puddle of her piss. She squirmed away from it and Tom grabbed her feet, tugging her towards him. Megan shrieked, but he slapped her ass hard, and she stopped, aware that it was a warning of worse things to come.
He cut her legs free without a word, severing the ties around her ankles with a box cutter, and hauled her roughly from the van. She groaned, pain shooting up and down her legs as the circulation returned. He forced her to stand, steadying her with one broad palm. The gravel pricked her bare soles and she winced. Tom laughed and brought his open palm down hard against her labia. The slap stung, nearly bowling her over, but she managed to remain standing. She looked down at her reddening clitoris and saw that he had dislodged some of the moisture hiding in her folds. She blushed again, hoping he wouldn't see.