« Back to Archive
Font:

Threesome Agreement P7 (The Experiment)

Author: @ggggggggxx • Published: 2025-12-13 • Length: 2910 words • ♥ 41 likes • 🔗 Series Chapter • 🌐 View on OpenTGC ↗

Start from the Beginning

See All

May

“Fuck,” Tyler muttered, snapping the laptop shut. The sound felt sharper than it should have in the quiet room. He stayed seated for a moment afterward, staring at the dark screen as if it might light back up and offer something different this time. Anything. But every search on 'Slutty-Stacy' enhancers had ended the same way. Polished press releases. Smiling stock photos. Promises about confidence and empowerment. Not a single concrete answer.

Four months into his stint as a woman, a pregnant woman at that, Tyler had stopped being surprised by the fact that something was wrong. What unsettled him now was how quickly it had all escalated.His back twinged as he straightened. The tank top pulled tight across his chest, fabric stretched to its limit by curves that still felt borrowed. He looked down, jaw tightening.

That was the part he couldn’t make sense of.

His hand came up, almost involuntarily, scooping one breast up as if to confirm it was real. It filled his palm heavily, warm and sensitive, the kind of fullness he’d only ever seen on other people. On models. On porn stars.

“There’s no way this is from pregnancy,” he muttered, squeezing experimentally. “Tits don’t just inflate to bimbo size like this.”

His other hand drifted to his stomach, rubbing the small swell there. The bump was still subtle, easy to overlook if he wasn’t paying attention.After he initially transformed on X-change, his body was reasonable. Perky tits, probably a C or B-cup along with a pert ass. After the party, she had filled out. Larger tits, wider hips. She had assumed it was due to the pregnancy.

But in March and April, her body exploded past “reasonable.” Hips that widened enough to throw off his posture. An ass that rounded out so fast his yoga pants started to be scandalous. He hadn’t eased into any of it. He’d gone from “beautiful woman” straight to “bombshell”. And worse, part of him had barely noticed while it was happening. After the shopping spree, Tyler had slipped into autopilot. That was the only word that fit. Not numb. Not unconscious. Just the perfect, doting fiancée. One that answered every dirty request from Kyle, giggling and flirting, and being fucked along the way. The sad part was that it was only after two weeks of additional shopping, wedding planning, working, and man-pleasing that Tyler finally “woke up.”

It practically only happened by chance. Taylor snuck in a dildo fuck after Kyle had left her wanting more, again.

While cumming, she’d caught her reflection in the mirror. The moment stretched uncomfortably long. Long enough for recognition to replace pleasure. The body looking back wasn’t just feminine. It was excessive. Curves exaggerated past what she remembered growing into. Breasts sitting high and full, skin pulled tight and glossy. Lips shaped for things she hadn’t consciously agreed to become good at. The rush that followed wasn’t just orgasm. It was awareness. Sudden and brutal. Memories replayed themselves with a clarity that made her stomach turn. Conversations. Choices. The way she’d agreed to things without ever stopping to ask why.

It was this confusing situation that Tyler had tried to grapple with for the past couple of weeks. Who were they becoming? Why? Could it be stopped? He didn’t bring it up with Kyle. Or Kate. Even the names slipped sometimes, blending together in his thoughts the same way his sense of self had. “He could tell something’s off, right?” Tyler thought. “I flip from slut-wife to reserved Catholic like a switch. Becoming a dude didn’t just turn his brain off.”

The memory of Kyle’s body pressed over him surfaced again. Confident. Focused. Taking Taylor without pausing to check whether she was really present.

… and not even trying to make me cum. Perfect girl-mode, Taylor was happy to let Kyle have his fun and more. “Fuck,” she cursed, biting her lip.

“He’s definitely hiding something, or truly is a dumb himbo now, or both,” she thought. He wasn’t due to come home from work for another three hours; maybe she could use this time to her advantage.

“Both times I’ve ‘girled out,” she reasoned, “were after something feminine… a threesome after a party, playing the perfect fiancée…” A hot flash interrupted her thoughts as she recalled that night.

Red rose to her cheeks, warmth entering her body, and she persisted. “After shopping and wearing women’s clothes…” She then considered that both times she “woke up” after a mix of pleasure or pain, paired with some awareness.

“Well,” a breathy voice filled the large living room. “It’s only a hypothesis unless you test it.” She walked into the bedroom and pulled out her favorite dildo so she could easily find it later. Then she took out her phone, punched in her code, and set a two-hour timer labeled “Have fun and wake up.”

“Wait, am I inceptioning myself?” She laughed as the absurdity of the situation revealed itself. At least fucking yourself seemed more fun than a bucket of cold water, she figured, as she moved to her wardrobe.

“What to trigger ‘girl-mode’ with…” she pondered, brushing her hand over the different fabrics in her new walk-in closet. A messy mix of slacks and button-up shirts that Kyle didn’t fit were an easy pass, but her hands lingered on the clothes in the back of the wardrobe that she had been ignoring. Full dresses, flowing shirts, and even a few skirts. She may have gone a bit overboard spending Kyle’s money in this “girl-mode,” and since leaving it, she’d been too embarrassed to wear them.

Her hand stopped on an exceptionally soft fabric. Silk; she could tell by touch. She lifted it by its hanger. It was a beautiful early-maternity dress, cast in a morning shade of blue. It was perfect for hiding the bump and later rocking it. She had gone back and bought it the following weekend but hadn’t worn it yet. Tyler remembered Taylor’s reasoning had been to save it for a special occasion with Kyle. “Ha!” she snorted. Now it was for her, she thought, as she took it off the rack.

“Putting on dresses was a perk for women,” Tyler thought as they easily slipped the dress on. The smooth fabric felt excellent on their skin, from the wisps brushing her shins to the padded, built-in bra letting her tits hang in comfort.

“Okay!” she said out loud, looking at herself in the mirror. “Am I… all here?” She took in her curves, proudly displayed in the blue dress.

She still felt like Tyler. Tyler with a new coat of paint. “Would I let Kyle walk all over me? Uhhh, no…” she said to herself. “Maybe I need to take this one step further,” she thought as she moved to her makeup stand.

She hadn’t really used it, but girl-mode Taylor was a big fan. Luckily, the hours spent training in front of the mirror, using a mix of Kate’s goods and recently purchased options, weren’t lost on Tyler post-awakening.

“Sure, contour, blush, winged tips, thick lipstick, the-fucking works,” she mouthed to herself, applying the makeup.

It took some time and a few fixes, but Taylor completed her task.

“Damn, girl, you look gooood,” she breathed into the mirror, holding her mouth in a soft O. “Well… now what?” she thought, leaving the bedroom and walking around the large, empty house. Kyle wasn’t due to be home for some time, so what’s a girl to do? She moved to the speaker system and started playing some music to keep herself company in the lonely abode.

“Oh my god!” she squealed as one of her favorite pop songs came on. She rushed to the couch near the speaker, singing along to the sultry lyrics and posing to her reflection in the dark TV screen.

“God, we should go clubbing!” Happiness poured over her as the idea of taking Kyle to a club and grinding on him filled her thoughts. “God, what should I wear?”

“Babe, I’m home!” A booming voice tried its best to overpower the song. The sound of the front door shutting followed.

“Baby! You’re home early!” This was a bad thing. “What, no it wasn’t… it was a good thing. He was going to be away for hours,” Taylor rushed over to her future husband, wrapping her arms around him. He looked good, suit, sharp pants, groomed hair.

“Yeah, I was able to close something out earlier than expected. Here, let me turn the music down. Damn, you look good. What’s the occasion?”

Taylor shrugged. “I don’t know. I wanted to try to look pretty and see what would happen.”

Kyle gave her a weird look. “You… uhhh, feeling alright? You’ve been kinda reserved these past few weeks.”

“Of course I’m alright!” she quipped, getting up on her toes to plant a kiss on his cheek, her left hand on his waist for support. The kiss didn’t stop as she went back for seconds, and the hand…

“Yes, yes, yes, more, make me yours, baby,” she moaned as her tits bounced to the rhythm of his cock.

“Ugh, fuck yes. God, this rules. Fuck,” Kyle grunted, slamming into her wet pussy. “Now be a good girl and put those tits to use.”

“You like that? You little slut?” Kyle talked dirty, causing Taylor’s pussy to quiver.

“Yes. I’m your toy, baby,” she bit her lip, eager to make her man cum.

“Fuck… quick, drink it up.”

She moved under her man as he finished pumping into her mouth. The cum mixed with her saliva, painting the inside of her mouth with a terrible flavor. Unlike her first time months ago, this wasn’t pleasant. The smell made her nearly gag, and the texture made her shiver.

But like any good girl, she licked her lips and swallowed.

“Fuck… you’re perfect. I can see why dudes fucking love sex. Fuck,” Kyle forced out through deep breaths, his dick shrinking in his hand.

Even though she’d satisfied her fiancé, Taylor felt wired. Maybe something to deal with after she wiped her boyfriend off her face. She smiled with glistening lips and excused herself to clean up.

Cleaning off the last bit of foundation and makeup, Taylor wore a satisfied smile. She’d done it again. Pleasing her fiancé was a tough job, but someone had to step up and do it, and she’d been the perfect girl. He said so himself.

BZZZ. Her phone buzzed. BZZZ. The alarm was going off.

She picked it up from the bathroom counter. “Have fun, wake up?” she muttered. “What?” She turned to look at herself in the mirror, naked, beautiful, confused, and, most of all, still horny. “I made that alarm to… oh fuck. Fuck. Fuck. Fuck.” Tyler clenched her smooth hands, feeling the gold engagement ring twirl on her finger.

“That bastard… used me like a goddamn toy. He said so himself. And I wanted him to. Fuck!” Tyler stared at herself in the mirror. A rare visage greeted her, anger. “He knows something’s up. I’m sick and tired of being played with like some bimbo.”

“Well… are you a bimbo?”

Tyler looked up. An angry smirk rested on her face. “Did I say that?”

“Well… are you?” The lips didn’t move, but the eyes spoke in their stead.

“No.” Tyler found force deep within, turning anger into fortitude. “I’m not. It’s stupid to even ask.”

“Then what are you?” Taylor asked.

“I’m…” Tyler looked at herself, tits rising and falling with panted breaths, hips giving her that coveted hourglass. Even angry, her puffed lips looked pouty. Almost cute, now that she thought about it. “I don’t know anymore.”

Tyler’s eyes in the reflection weren’t his, they were hers. She looked at him, eye to eye. The voice continued. “You are waffling between not wanting to change and being forced to change everything. This conflict is ripping you in two, worse each time. You need to decide what you want to be, or others will continue to decide for you.”

“I want things to go back to how they were,” Tyler breathed, her breath fogging the mirror.

“Those are the cards you were dealt, Tyler. You have to play with the cards you’ve been given. Stop pretending you can ignore it all, avoid it all.” To make the point, Tyler’s pussy twinged in want.

“You want to be satisfied, do it on your terms,” Taylor said to herself.

“I’m the mother of his child… he should be serving me,” she said.

Taylor didn’t know what was going on, but she was mad, determined, and worse, horny. She turned out of the bathroom and back into the living room, stark naked.

“Hey, babe.” A relaxed Kyle met her, reclining on the couch and watching TV.

“You, you’re going to fucking eat me out.”

“Whoa, what?”

“I’m not your toy. I’m going to be your wife. I’m going to be the mother of our child. Lay the fuck down and make me cum.”

“Okay, wow… uhh, can we wait for me to, uh, recharge?”

“No.” She strode over, pushing him down onto the couch. “You’re going to make me cum with your tongue. Keep at it until I say so.”

“Uhh… okay.”

“Okay, Mother,” she corrected him, feeling a spark of power flow through her.

“Okay, Mothhr…” Kyle tried to speak before Taylor’s needy pussy interrupted him.

“Fuck yes, keep going, no stopping. I need to fucking cum!” Taylor screamed as energy tore through her wound-up body. She grabbed a fistful of Kyle’s hair, pulling him deeper into her pussy, her other hand stroking his limp cock.

“Now, pretty boy,” she breathed, focusing on his smothered face. “Were there some side effects you didn’t tell me about?” She saw fear flicker as his pace slowed. “No! Keep it up!”

His tongue dove back into her folds as he slowly nodded. “Mmm.”

“No talking. That’s what I thought. Well, Kyle. No more treating me like a sluuuut. Oh fuck, yeah. Good. More.” She commanded as another orgasm ripped through her. “I need attention. You’ve gotten…” She felt his dick slowly stiffening in her hand as willpower returned. “Hmm… you’ve gotten cocky. If I’m going to marry you, you need to be on your best behavior. You need to start treating me right, like a lady, not some horny slut. Understood?”

He nodded quickly between Taylor’s thick thighs, the motion setting the perfect tempo. “Fuckkmmmm. God. That’s a start. But I expect to be wined and dined. If you wanna wear the pants, then I should at least get the perks of wearing the dresses. I’m not some college, cum-starved slut, so quit acting like it,” she moaned, letting the sparks from Kyle’s oral bounce through her body.

“Now be a good fiancé and fuck me how I want to be fucked. And you better finish in my pussy. I want you inside me. You’re mine.”

She stepped off his face, letting him gulp air, his lips shone, covered in her cum for once. “Fuck, Taylor, I’m…”

“Shut up and fuck me, Kyle,” she cut him off, presenting her rear. “Actions speak louder than… ohhh, fuck yes. Slow and steady. Just like thaa…”

Taylor pushed her ass back onto Kyle’s dick as far as she could, taking every inch before feeling the pleasurable twitch of his cock. For the first time in a while, they came together.

“God,” Taylor said, satisfied as Kyle’s cum dripped out of her. She felt herself. “Was that so hard?”

Thank you for reading! Thinking 1-2 more of these!