Stan was overtaken by shame and lust as he pounded his subordinate from behind. He wanted nothing more than to be faithful to Alice, his wife of sixteen years, but around Titties Proctor, he could never control himself. Alice tried to be understanding; after all, to lust was only human, and monogamy was mostly an ideal to aspire to, more than a hard rule. Everyone wants to get their rocks off. Still, whenever he told her, Alice always seemed distantly, reservedly disappointed in him.
Titties Proctor had always said she was a lesbian, and she even used the courtyard instead of going across the street, but Stan knew preferences fall to the wayside when you just want to fuck. Maybe she just went after Stan because she knew she could get him. It was something in her eyes. She was impossible to deny.
Even with the undeniably pleasant view of Titties Proctor's perfect ass bent over the men's toilet, blue jeans down around her toned calves, rocking in erotic rhythm as his balls slapped against her and his bare cock rammed through her heavenly wet pussy, these were the pensive sort of thoughts Stan entertained. Titties Proctor really was trouble. She did good work, but she was lazy, and distracted, always finishing things at the last minute. And she was rude. She'd been on her phone the whole time he'd been talking to her.
The very same phone was sitting, neglected, on top of the toilet paper holder as he fucked her. What could be so important? Figuring a little snooping was fair turnabout for taking advantage of him, Stan picked up the phone. Titties, for her part, raised no objection, squealing with delight when he pulled back hard on her hair to turn her head around and unlock her Face ID. She was in nirvana.
The screen that greeted him when he unlocked her phone was unfamiliar, but looked much like any other camera app.
“Is this ~uhn~ snapchat or something?” he asked himself out loud, still thrusting dutifully.
“MMMMMMMnnnnnnnnnnnn!!!” Titties moaned in response.
Exploring, Stan tapped at the screen, selecting Titties Proctor as he pounded her harder.
Immediately, the app generated a sentence. He didn't see it, though, as Titties' wonderful little cunt gripped him even tighter. The phone clattered to the ground as he grabbed her gyrating hips to keep from falling. Seven seconds later, he felt an irresistible, artificial urge. He had to change something. Equally unable to resist the phone or to stop fucking Titties proctor, he pulled her to the ground, turning her around and fucking her missionary style on the bathroom floor, breaking open the stall door as he flailed to grab the phone. She was moaning and calling his name in bliss. One of their coworkers, (was it Doug?) stepped past them at a respectful distance, clearly aroused by the scene but too polite to get involved. Finally, Stan got a grip on the phone, and read the sentence he now had to change.
“Titties' shapely breasts are bouncing rhythmically as she takes your moderately large cock.”
Stan had always been quietly proud of the size of his cock. In his single years, having at least daily casual sex, he'd gotten numerous complements. To see that pride reduced to 'moderately large' was a blow to his ego. He changed it to 'extraordinarily large'
When he did, the screen flashed red, and another word had changed.
“Titties' shapely breasts are growing rhythmically as she takes your extraordinarily large cock.”
In a second, the pressure and pleasure on Stan's cock multiplied, as Titties gasped and screamed in agony and ecstasy. It was impossible to tell exactly without pulling out, and he never could pull out before she finished, but his already respectable cock had more than tripled in width, and he could see the bulge the tip of his shaft made in Titties' abdomen as he pounded her, now easily past her pussy and deep into her womb. What he didn't notice was the heaving of Titties' titties, rising and lowering like the tide with her breath, growing imperceptibly larger with each thrust.
The power of the app was not lost on Stan and as he continued to plow her on the bathroom floor, he raised the phone and selected her again.
“This irresistible slut has a rocking body and a lewd name, unbecoming for a modern woman.”
This time, Titties noticed, and, fearless of the app's power, seeing it pointed at her only made her hornier and pushed her closer to the edge. “Are you ~Ah!~ using that ~Ooh!~ App on me?” she squeaked out between gasps and moans. “Mhm,” Stan grunted, considering his options. He just needed to be able to turn her down. He could change 'slut,' but he still wanted her to be able to function in society. After several seconds of deliberation, the timer ticked down, he felt the same compulsion as before, and he changed 'irresistible' to 'obedient'. Something else changed too, but he didn't see.
“What did you ~Oooaah!~ do to me?” she pleaded in bliss, approaching her first female orgasm.
“Don't worry about it. Just ~ungh~ come already!” Stan snapped back at her, and she did just that.
As she screamed and convulsed, her pussy gripped down hard on Stan's gargantuan cock, sending him over the edge with her. He braced himself against her hips as his rod pumped wave after wave of hot cum deeper into her than he'd fucked any woman before. Her breasts were visibly larger now, having gained at least a full cup size in just a few minutes of fucking.
Stan panted heavily, sitting on the cold bathroom floor, in post-orgasm shame. After a minute, he caught his breath, and picked up the phone.
“This obedient slut has a rocking body and a lewd name, underwhelming for a modern woman.”
Well, the word 'obedient' should have solved his problems, if the sixteen inch flaccid rope still deflating in his lap was any indication of the app's power. He thought back to his wife, in his moment of weakness. Pulling out his own phone, he scrolled through his contacts. Besides the men's names, which he recognized, were names like Cumdumpster, Deepthroat, and Sugarlips. He sighed at the phone, still showing the latest sentence. Of course, if a name like Titties was underwhelming, these names must be par for the course. He wondered what their bodies were like. He typed in his wife's phone number, and saw that the name attached to the contact was 'Cherryclit Wilson'. Of course.