Note to readers: This story involves performance of bodily functions. In case the subject matter is not to your taste then you may prefer not to read further.
I am grateful to my wonderful friend and mentor, lesliejones, for encouraging me to publish the story on Literotica. All active participants are over 18 years.
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Denise had waited all week to indulge in her special new experience, a bizarre and intoxicating variant of one of her favourite pastimes. The mere thought of it was making her wet. Thinking back, she wondered how she had never thought of this before...
Her close friend, Margaret was away on a course, leaving Denise alone. Her friend was an outwardly capable and elegant businesswoman, always meticulous about her attire, her coif and all matters of personal hygiene - quite the opposite of Denise. Yet underneath she was a natural submissive, ready, even eager to subject herself to the most extreme and perverted debasements Denise could think up. Denise was naturally dominant and would think up scenarios of the most extreme and humiliating nature. As befitting one such as Margaret, they all involved the apotheosis of her outward character - exhibitions of urination, defecation, soiling, etc. Normally her friend would visit a couple of times a week and Denise would inflict on her some particularly filthy and degrading, but this week she'd be alone. She'd been about to invite one or other of perverted girlfriends but on impulse decided on something entirely involving herself. She would deny herself any defecatory relief for a full six days, letting the fecal waste of her digestive system accumulate in her bowels. The specially designed buttplug was attached to a waist-girdle and legging straps with a counter appliance that nestled snugly in her vagina. The arrangement wasn't comfortable but that drawback was compensated by the excitingly dirty feeling she had at wearing such a device, and delicious sensations it stimulated in her cunt. It ensured nothing would escape from her anal exit. It wasn't easy to live with it - several times she thought about cutting short the gestation period but she fought the cramps and increasing bloatedness. When she finally released it would be monumental. To add a certain piquancy she decided to let it happen in a public place.
The next town harboured a university and a couple of colleges so she expected a good number of young men and women who she thought she might engage with or at least prove a suitable "secret" audience. She drove the ten miles to the mall at the edge of the town and parked in the far corner, some minute's walk to, and from the main entrance. She was quivering with excitement as entered the "disabled" stall in the ladies' restroom, carrying the bag with her change of clothes. Quickly she stripped off the old sweatshirt and sweatpants; she would ditch those in the nearest garbage bin. Now she would have to be careful so as not to spoil a week of patient preparation. Naked except for the plug, she first placed the skinny black tank-top and jeans on the clean, dry floor, then slowly eased the plug from her anus. After nearly six days it was firmly embedded and it was a delicate operation to remove it from her by now sore and stretched rear passage. She made sure to withdraw it slowly so her sphincter could close up. Before continuing she sat down to piss - an empty bladder would be preferable - then put on the top and with difficulty pulled up the skin-hugging jeans, her tightest pair and her favourite garment for what she was going to do. The denim was soft and becoming faded after many washes, and was distinctly brown on the inside of the seat. Wow, the material gripping her between the legs was a turn-on of its own. Finally, some work with the hairbrush and an application of makeup meant that as she left the restroom she was transformed in appearance from the outwardly plain and mousy housewife to a feisty street girl.
She walked carefully at first, still conscious of the emptiness where her plug had been, and then more naturally. She made no attempt to force the issue, let nature take its course while she browsed the stores or sipped coffee. Early evening on Friday and the mall filled up. She had no difficulty chatting with some of the young college women who inevitably thought themselves very naughty and daring as they exchanged experiences, with their minds were invariably set on getting laid by some boy.
It was in Border's that she found her chance. There was a group of chatting and she happened to hear a snatch of conversation, "... she did?... and Todd told you... making out in the back row of the cinema... with Lindy... and she... in her panties? Wow, how gross!"
So, she though, did one of them really mess herself? This was better than Denise ever imagined. Apparently oblivious, she wandered up and down the aisles, hoping to find out who this Lindy was, and she was not disappointed. She sauntered away and a few minutes later went to the coffee bar where some of the group were waiting in line for coffee. She was sure none of them realised any of their conversation had been overheard. As luck would have it, one of those from the group, a somewhat busty blonde came to line up behind her. She was wearing a flared black denim miniskirt, trainers, and a white cotton top tied below her breasts to reveal several inches of flesh above her pierced belly-button. She must have been about nineteen but the immature way she dressed made her look younger. From the interplay with the group it was obviously Lindy. Denise's heart leapt. Once her identity was established it was child's play to engage her in small talk while they waited in line.
Despite her dress, the girl was well-spoken, suggesting a good family background and polite enough to invite her join her at a table for two. Denise introduced herself, explaining that she was thirty-four. She used to work in IT but was now training to be a teacher. She was using her day off to replenish her depleted wardrobe.
"You look like you might be at the college here, Lindy."
"Yes I'm at the uni, majoring in Arts as my major which I love, Math as my minor which sucks. Just started my final semester, turned twenty a month ago."
They continued to make anodyne conversation until Lindy's friends got up.
"Coming Lindy? Shani has her car but has to leave right away. Or are you staying, I guess your mom will come by anyway later."
By now the girl was enjoying the attention of the older and obviously more experienced woman. Reluctant to part, she signalled she'd stay, and Denise was now able to get into closer conversation.
"I hope you don't mind my saying, but you look real cool in that outfit, it looks great one you. How old are you Lindy?"
As she expected, Lindy blushed at the compliment. "Why thanks, people say it makes me look rather immature, but I like it. I hope you don't think it emphasises my boobs too much?"
"Not at all, I wish I had tits like yours, I'd show them off too. Now I mention, I came here to get some underwear, what's the stuff like in Penney's? I'm looking for something youthful, would you like to help me choose?"
"Yeah, sure would!"