Sienna's Unusual Breeding Session
Sci-Fi & Fantasy Story

Sienna's Unusual Breeding Session

by Filthyitty20 13 min read 4.1 (15,500 views)
nonhuman breeding impregnantion breast expansion fertile body transformation noncon
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This is a work of fiction. All characters are above the age of 18. All names, characters, locations, and incidents are products of the author's imagination, or have been used fictitiously. Any resemblance to actual persons living or dead, locales, or events is entirely coincidental.

***

At 30, Sienna had just broken up with her boyfriend of 5 years all because he didn't want children and she desperately did. Not so much because of her maternal instincts, but because somewhere in her heat she believes that to truly fulfil her purpose of being on this earth, she needed to be bred - just like is meant to be. However her boyfriend wasn't of the same mindset, hence their breakup. Now, a week after moving out of their shared apartment and into her own - she feels free.

"Babe, you need to get back out there," her best friend, May, chimes from the phone as Sienna is unpacking all her boxes and fixing up her new home. "The best way to get over someone is to get under someone else," she continues.

Sienna didn't tell May the real reason for the breakup as she was ashamed. Breaking up with someone because she had the primal urge to be bred was far too embarrassing to tell anyone. Instead, she had just given a generic reason.

"I don't know May," shrugged Sienna. "It might be too soon to go out. Plus, I don't really feel like getting dressed only to have a night of less than mediocre sex."

Sienna's pussy tingles at the mention of sex. In the last few months of the relationship ending, Sienna and her boyfriend really weren't having any sex and it had gotten rather stale. Self care has always been important to her and that includes self pleasure. Since she was in a completely new neighbourhood where she didn't know anybody, Sienna decided to visit a sex shop and pick something up for herself.

Later that afternoon, Sienna walked to a nearby adult store. She was sure she wasn't going to run into anyone but she still had sunglasses on and a hat to cover up. As soon as she entered, she was surrounded by various sex toys. Sienna had never been to such a shop before so she decided to take a lap. Apart from the one lady at the register, the store was empty.

'So many options,' Sienna thought to herself. She had no idea what to even get for herself. She decided to muster up some courage and ask the woman for some help.

"Hi there," Sienna said shyly to the woman at the register. Jane read her name tag.

Jane smiled. "Hi lovely. How can I help you?"

"Um, I was wondering if you could help me. You see, I broke up with my boyfriend of 5 years last week because he didn't want kids and I really do and we weren't really having sex much and I'm here because I've decided to own up to my sexuality and um, I'm looking for something to help me do exactly that," Sienna rambles nervously.

Jane chuckles, "Take a breath dear and you've come to the right place. I have exactly what you need. Let me go grab it." Unbeknownst to Sienna, Jane misinterpreted the wrong thing she needed. Sienna wanted just a simple toy to pleasure herself with however Jane thought she wanted a special toy to fulfil her fertility needs.

"These two things should help you out perfectly," Jane exclaims as she returns. In one hand she has what looks like a pill bottle and the other is wrapped in a plastic bag so Sienna can't see what is inside.

As Jane hands her the two bags, she gives her some clear instructions. "For the toy to work, take 10 of these pills, 1 every hour, before you use the toy. It is very important that you do so. Stay at home over the weekend and trust me, all your needs will be fulfilled."

Sienna, although a little confused, pays and turns to leave but just as she is leaving, Jane stops her and leans in to whisper. "For the best outcome, I recommend getting naked while you're taking the pills and using the toy. Probably be best to not wear anything on the day you use it. Be warned though, once you take one, you must follow the entire routine." Sienna thanks her and hurriedly leaves.

Having never been to that kind of a shop before, Sienna was taken aback. But she figured that's how it normally works. She drove home, her pussy wet in anticipation of the night after she'd taken all her pills and finally gets to the toy.

Reaching home, Sienna decides to heed Jane's advice and quickly closes all the blinds and curtains in her home. She undresses completely and takes out the pill bottle. Standing in front of the full length mirror she set up in he living room, Sienna admires herself. Standing at 5'7" with strawberry blond hair, honey brown eyes, 34B boobs, shaved pussy and a skinny body, she's always been praised for how beautiful she is. But something has always felt missing. She had never felt sexy.

Shaking those thoughts away, Sienna takes a pill from the bottle and swallows it with some water. Never having been completely naked and roaming about her home before, she quite enjoys the freedom. While waiting for the hour to be up, she decides to unpack some more boxes in her bedroom.

Halfway through the hour, Sienna starts to feel a series of tingles, but not in her pussy. No, these tingles are coming from her boobs and her lower stomach / hip area. Sienna is alarmed, she quickly goes to the mirror to see what is happening and can visibly see her boobs and hips grow a little bigger. She gasps, not understanding why this is happening. All she wanted was to have a little fun. Her eyes start to well up when she remembers that she can't stop taking the pills and will just have to accept her fate.

Her reminder alarm for the next pill rings and reluctantly Sienna takes the next pill. Like clockwork, thirty minutes later, her body undergoes another similar transition and Sienna has no other option but to let it happen.

---

Nine hours later, Sienna had taken all the pills. After she accepted that there was nothing she could do, she was determined to make the most of this. She was determined to be happy about whatever happens and made a plan to visit Jane the next day to ask her about all this. She hadn't dared looked into the mirror or at her body since the first transition, afraid of what she'll find. But she didn't need to. She could feel it.

Intent on seeing her "new" body, Sienna headed towards the mirror. She gasped in horror and delight at what she was looking at. Still 5'7", she now had a perfect hourglass figure, with wide ideal child bearing hips and a 34E cup size. She couldn't believe it, she looked...sexy and curvy and so fucking sexy!! An absolute goddess. Giddily she turned around and saw her round plump ass.

"Yessss," she screamed while jumping up and down. She finally felt like she was meant to carry a child, to be bred. Het wet, dripping pussy also agreed.

Elated, she finally opened the other packet from the shop, the one with the toy. It looked like an ordinary phallus shaped dildo. She couldn't believe she had to go through a whole body transformation to play with a simple dildo. There was an instruction packet though. She took the instructions and the toy to the couch and lied down. If nothing else, at least her pussy would receive some satisfaction.

She opened the instruction booklet hoping there were some techniques on using the toy, however there was only one line printed.

"Place toy inside your vagina and leave it be."

'This is fucking strange,' thought Sienna. Leave it there?? What good is that gonna do me, however like the good girl she is, she did as told.

She spread her legs on the couch and slowly inserted the dildo, which was extremely human like, into her tight wet pussy. And left it as it.

For a few minutes nothing happened. Sienna's patience was wearing off. She desperately needed some kind of relief but simply keeping the toy in her was doing nothing. When suddenly, she felt something. Instinctively, a moan escaped her.

'What was that,' Sienna thinks to herself but before she can think too much, it happens again. This time faster, with more gusto. She gasps. The dildo...it's thrusting.

"Aaaahh," screams Sienna as the dildo expands and collapses itself in and out of her pussy. It is so life like that if she closes her eyes, Sienna can't tell the difference. The toy is good, it somehow knows exactly what she needs. It keeps thrusting, in and out, filling her pussy up so good and all Sienna can do is moan at the mercy of this toy.

Sienna screams through her first orgasm as the toy keeps fucking her even as she is cumming. It's the first time she's ever cum only through penetration. Once her orgasm dies down, she foolishly believes it's al over, however she feels something rub against her clit. She looks down to see that the toy has grown some kind of an extension which is tucked into her clit and is rubbing her.

Sienna can't help but moan. The stimulation from her clit and the simultaneous thrusting has her cumming again and again. It's like she can't stop. After her fifth orgasm, she lost count at how much she had cum. Her couch is covered with her cum and juices. It is filthy but she doesn't care. She can't care. She can't stop orgasming.

After what feels like an eternity, the extension from the clit disappears and Sienna lets out a disappointed groan. Yes, she was feeling overstimulated but that didn't mean she wanted it removed. But something else happened then, the dildo started speeding up but it was different. It was as if it had a purpose other than Sienna's orgasm. Of course because she was so stimulated she kept cumming but after she had a few orgasms, the toy did what felt like a final thrust and Sienna gasped.

She felt something filling her up. As if the toy was planting its seed inside her. "How is that possible," Sienna horrifyingly exclaimed. She panicked wondering what the toy was depositing inside her vagina. She couldn't help but feel scared but excited.

Once the toy stopped "cumming," it collapsed and remained in Sienna's pussy as a patch. Presumably, to keep whatever it deposited from leaking out. Sienna soon passed out on her couch after that.

---

The next morning Sienna is awoken by a strange feeling. All of a sudden, she feels very heavy like she gained a bunch of weight overnight. As soon as she opens her eyes, stands up and looks at her body, she almost screams in disbelief. She has a baby bump. An actual baby bump.

'Surely not,' Sienna thinks. 'It's just not possible. There is no way a TOY can father a child. And even if it did, how am I showing this fast?? Did I suddenly time travel?? I wasn'y even ovulating yesterday. What is happening??'

She also checks her boobs which feel even bigger and much more heavier. She gives them a short squeeze and is shocked when volumes and volumes of milk spills out of them. She is bewildered. There was no milk in them the previous day. How is this possible???

Immediately, she makes an emergency appointment with her gynaecologist. 'I need to get to the bottom of this.'

Once the appointment is fixed, she goes to take a shower and take her mind off of everything that has happened in the past twenty-four hours.

After Sienna has had a chance to relax in the shower, she gets out and tries to wrap her towel around her however it won't fit. The towel won't fit completely around her body. Feeling completely humiliated, she dries herself before heading towards the living room to find the box that stores her clothes.

On the way to the corner where the boxes are kept, she stops by the mirror. She looks at how flushed her cheeks look, how heavy and big her breasts look and finally the baby bump that ties it all together. She doesn't yet know what this is but she knows that she has finally been able to fulfil her purpose of being bred and becoming pregnant. She admires her pregnant body from all angles before remembering to get some clothes so she can leave for her appointment.

She tries to put on her underwear but it won't fit around her thick thighs and round ass. She is horrified. With a sense of hurry, she tries on her bra which of course also does not fit. She is alarmed. None of her clothes fit. She has nothing to wear to her doctor's appointment. 'This is not good,' Sienna thinks before she remembers a t-shirt of her ex's that she kept. She quickly digs it out from the bottom of the box and puts it on. It used to be very oversized on her and would reach her knees but it's not as loose anymore and it only barely covers her bare ass. With no other option, Sienna gets in the car like that and drives to her appointment.

She gets there with five minutes to spare. She sits down at the reception/waiting area filling out some forms the nurse gave her. She feels very self-conscious only wearing a t-shirt but she averts her gaze from the other people in the room and concentrates on the forms. I felt a bit embarrassed having no one with me while the other women seemed to have their partners with them.

"Sienna Jordan," the nurse calls out. I stand up and follow her into the examination room.

She helps me onto the examination chair. "Please make yourself comfortable. The doctor will be in to see you shortly."

I sit patiently waiting for the doctor to arrive looking around the room at all the posters, the ultrasound machine, the information pamphlets etc. Just then the door opens and the doctor walks in.

"Ah, Sienna, how are you doing today? I'm Dr. Miller, I'll be looking after you today."

"Not too bad. Nice to meet you."

As the doctor sits in her chair near the ultrasound machine, she asks me to lie back and pull up my t-shirt. I hesitate.

"Everything okay?," she asks.

"I--It's--I," I stammer and hesitate unsure of how to inform her of my unfortunate no underwear situation but thankfully the doctor seemed to understand my problem.

"Don't worry darling, I've seen it all," she assures me.

I pull my top up humiliated and a little turned on by my exposed lower half. I keep imagining someone coming in the exam room and fucking me.

Dr. Miller places a cold liquid over my belly and then places the scanner over my belly. We both look at the screen and then suddenly the room is filled with that sound of a heartbeat.

The doctor beams, "Congratulations, that's your baby." Sienna's eyes swell up with tears. She has finally gotten what she wanted for so long. Her own child.

"Uhh wait," Dr. Miller says and immediately Sienna is a bit panicked. "It seems like there are two more in here."

"Two more??? What?"

Dr. Miller smiles again, "Congratulations, you're pregnant with triplets. You're 6 weeks along so far and everything looks completely healthy."

Sienna can't believe it. That fucking toy got her pregnant with three kids?!?!? She didn't understand how. But all her anger and betrayal disappeared when the doctor handed her the sonogram of her babies. She was going to be the mother of three. She was delighted. She was finally going to be able to fulfil her purpose.

She was bred. She was pregnant. She was happy. Even if her baby daddy was a sex toy.

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