Warning: This NSFW story is about two people in d/s relationship with genderplay elements that get augmented by physical changes of a feminine nature. If such topics bother you, I would advise not clicking through
Back from a harrowing day at the office, Mistress Meredith Klein entered her corner condo with a relieved sigh. Pausing for a moment to pull off her heels, her height dropped from just over six feet to a paltry five-foot-nine. Padding silently along the hallway in her sheer knee-highs, the sunset danced on her pale skin as it reflected off the glass windows of the next building over in the skyline. Her wide, round ass swayed back and forth under her tight canvas skirt. Massive boobs, their fullness verging on fake, strained a pink silk blouse and a black sport coat.
She shuddered with anticipation upon entering her sanctum. It had long ceased being just her bedroom. The huge four post bed in the middle of the floor was laced with straps and loops of colorful rope. Just looking at the frame made the moans of her most recent pet fill her ears and she anticipated even more later. For tonight was the night that Aaron Matthews irreversibly became Erin Klein.
Ms. Klein absently rolled a glass vial full of seafoam green liquid between her fingers. The feeling of it sloshing in her grasp was almost hypnotic. When her watch beeped the half hour, she realized she had been caught up in imagining what it would be like after tonight. This was actually all Erin’s idea. The sex change the last leg of a journey begun months ago.
Aaron had been Erin for most of it. The once meek man had accepted thinking of herself as a woman quickly after becoming Meredith’s sub. The gender transition had been enthusiastic…too enthusiastic, even. Ms. Klein had broken men before and made them her sissies, but Aaron had been unlike any before him. The IT tech seemed to be enjoying himself as she stripped away his masculine identity, but her new personality had not been molded into a subservient sissy.
As Aaron’s mind morphed into Erin’s, her confidence soared. It was completely unexpected, but there was no denying the mental transformation had strengthened Erin. Her unwavering obedience was not from humiliation, but from deeply held respect for her alpha. There was no subservience in her stance or voice. There was no fear in her eyes when bound and powerless. Her pleading while they fucked was not of a man choking on his pride, but of another woman who loved being fucked.
Meredith might have chosen Aaron to be a lapdog, but Erin turned into a wolf.
Shivering with excitement, Ms. Klein put the vial on the nightstand and stripped down until all that remained were matching underwear of pink silk and black lace. Though they had fit wonderfully that morning, both were a little undersized now. It seemed taking four pills last night had caused a noticeable effect. She would have to make sure Erin took five before they got started that evening.
Undoing the front clasps, her full tits sank only slightly as the firm mounds settled against her ribs. She lost herself for a moment as she explored her expanding endowments. They had grown quite hefty, their weight like ripe honeydew melons. They were also so very, very warm against her skin. Letting them slip through her grasp, a coo became a moan as her nipples dragged across her palm.
This was one of those unexpected turns. It had begun as something of a setup to make Aaron more pliable. She wanted him to ask for the drug which would fill his mind with the desire for sex, so she had left the documentation open when Aaron came to service her PC. Her eager pet had pretty much begged to give the supplements a try and she made it happen that very evening.
Being the VP for marketing had its advantages. No one questioned what she was doing with the free samples. Because they were for handing out at trade shows, it turned out samples were actually much stronger than the real thing. This heightened the intensity of the side effects from long term use. When she saw scrawny Aaron begin to fill out with womanly curves in just a week on one pill a day, she strongly suggested he take two every night. As he did that, she started taking a dose of her own each evening.
She had told herself then it was just for a little boost to her own libido. Bit by bit, that little boost had quickly turned into a central part of her life as she and Erin both reveled in the supplement’s side effects. By time they were up to three pills a night, her bust line had gained more than five inches. The significant growth swelled her from an average bra she could get anywhere to a massive one that she had to order online.
It had become impossible to hide she was partaking, never mind the massive changes to Erin. When the CFO returned this morning, after being gone for two weeks, he called her into his office. She expected to be fired. Instead, he pitched the idea of her launching a rebranding campaign for the drug based around the changes to their bodies.
He offered a handsome amount of compensation for her additional time and exposure. He had no idea Meredith was the kind of woman who would gladly stand around in almost nothing or that Erin would agree to anything her dominant suggested.
She made sure to not snap accept and emailed him around lunch to agree, including terms that Erin was to get a hefty bonus as well. Then, she went down to the lab.
From what Dr. Orgisa told her during her visit just scant hours ago, the two of them would keep growing so long as they kept taking the supplement at an elevated dosage. The changes to libido and stature would become permanent, but there were not many other risks beyond the growth accelerating.
That, however, was the future. The now was all about Erin.
Pulling on something loose and easily removable, she planted her ass in her plush arm chair. The seat had been crafted to be just wide enough for someone’s knees on either side of her thick hips. That was most of why she liked it.
Not thirty seconds later, Erin walked through the door. She was so very tall, her sculpted runner’s legs seeming to go on forever. She slipped out of calf length boots and hustled down the hall. Her now flawless skin had slowly taken on a tan cast as she spent more time outside.
Each hurried step made her marvelous leg muscles flex under her tights. Her bust wobbled under a wide collared peasant top as tits about as big as grapefruits shifted in her hand-me down bra. Tan lines from her bikini top glowed on her shoulders below a very subtle leather collar that looked like a choker. Her long red and black braid swayed opposite her chest, occasionally bouncing off her truly phenomenal ass. The long locks had started as extensions Erin had picked out, but something about the side effects fused the false hair with real. At this point, it was as if she had been growing her hair for the better part of ten years.
Erin waited at the doorway to be permitted entry into the bedroom and then knelt at her master’s feet when she entered.
“I got here early, Ms. Klein,” she said before grinning wide enough that her bright green eyes closed.
Meredith rubbed her pet’s head. “That’s my good girl.”
As Erin’s stretched lips relaxed, they puffed up a significant amount. Her face had become reminiscent of Marilyn Monroe’s, only turned to eleven. It was hard to believe that a few weeks ago that same face had been thin lipped, gaunt, and hidden under a sparse scraggly beard.
“So…did Orgisa come through?”
Ms. Klein produced the vial and swirled its contents. Erin’s eyes followed the fluid’s movement with a hunger usually only displayed when pinned down under her master and forced to eat her out. She actually licked those full lips as she reached for it. A slap sounded in the room and she whimpered as she clutched her hand.
“You forget yourself, pet. What must good girls do?”
“Ask before touching, Ms. Klein.”
“Exactly. Now, are you sure you want to do this? Orgisa said this will not be reversible.”
“I’m sure, Ms. Klein. I’ve never been more sure in all my life.”
She raised a brow. “Oh? Even more sure than choosing to become my pet?”
“Point taken, Ms. Klein. I’ve only been more sure once in my life.”
“Excellent! I will see you on the other side, Erin.”
“Thank you, Ms. Klein.” She pulled the stopper out of the vial and paused.
Meredith watched the last vestiges of Aaron tighten for a moment before they relaxed into Erin. She closed her eyes, took a deep breath and let it out, but she did not drink the serum. She stoppered the vial and handed it back after a moment.
“You know what? I don’t need to do this.”
“Don’t need to? I thought you hated being male, that you wanted to change everything about yourself.”
“Yes, on both counts, but now…I like being in this space kind of in between sexes. I’m certainly not a man anymore, but not a woman either. I’ve found a me I enjoy being and you helped me find it. You showed me how to find the confidence to become that person.”
“If you had that confidence, why did you say nothing, pet?”
“I was trying to find the right time. You were so excited about this and I love seeing you excited. This is not the end of me changing, I want to keep finding out things about myself, but I don’t think becoming irreversibly female is what I need right now.”
“I…I guess I can understand that and respect it. I promised you I would not force you to do anything, but I’m not sure where to go from here.”
“If you’ll have me as I am, Ms Klein, I am more than happy to continue being your partner.”
“Partner, huh? A little presumptuous aren’t we, my pet?”
“Am I? You’re the one who had the paperwork for us to get married in her Documents folder on the network.”
Meredith was surprised to find herself blushing at that.
“Ma’am? Do you still want to get married?“
“I love Erin after all and you are still Erin.”
Neither of them remembered their wedding night, but they awoke in each other’s arms. Erin cooked breakfast in just an apron like always, though her cock peeked out from behind now instead of being tucked back. The scene was not anything like Meredith had imagined…it was better, honestly. (1807)