Doctor Who - Behemoth - Part 4
Content: Weight Gain (WG), Slob, Blob, Mind Manipulation, Big Beautiful Women (BBW), Humiliation, Feedee, Feeder, Original Characters (Ocs), Sex, Stallions, Cum, Facesitting, NSFW
ChonkAuthor (Prompt - Summary): The Doctor is tricked by Yaz!Master into joining her on a weeks long cruise on the space cruise Behemoth, run by an alien race who prize fat women. The idea is, of course, for The Doctor to be fattened, mind-broken, and humiliated as she’s turned into an obese sex slave. But the Doctor, open to all new experiences, ends up enjoying it. The Master, naturally, not only falls victim herself but absolutely does not.
The Master's plan and agreement with Ie's kind hadn't meant to include her partaking in the excesses offered on the Behemoth to the extent now showing itself on her figure. This was all meant to lull the Doctor into a false sense of security, dismantle her will to resist, and bring her down to the level required by Ie's kind to make her perfect breeding stock; fertile, fat and feeble-minded. Not her.
But she waved away those concerns and dived head first into the hustle and bustle of a new day, going out to enjoy everything the Behemoth had to offer with the Doctor and sometimes Ie and marvelling at the other guests showing all the tell-tale signs the lifestyle offered to them here was beginning to take ample shape.
It wouldn't be long, thought the Master, when she'd take a massive step back from carnal pleasures and feral desires and wild indulgences of the Behemoth and set her sights firmly on the Doctor's fall from grace, pound by pound, inch by inch, meal by meal.
So the Master told herself a split-second before she snapped her fingers to gain the attention of a passing service bot.
Its television head spun to look in her direction first then followed by its body a second later before beginning to move and speedily navigate its way past lumbering guests enjoying the tropical themed beach area and sun lounger dotted about the place.
Two months into the year-long cruise and a ripening plumpness was clear as day on everyone the Master could see from the comfort of her own sun lounger.
The service bot came to a stop at her side and said, though it had no chance to finish as the Master would interrupt it, "How might I-"
"One of those-" she considered her options carefully, sampling a taste of sweat treat memories and delectable recollections, for something to sate her appetite "-Taste of the Galaxy doughnut platter. Sharer."
Without missing a beat, the service bot bowed and said, "Right away. We apologise-"
A thought struck the Master to interrupt the service bot for a second time. "Make it the sharer for four."
"Right away. We apologise for any delays with your order."
The Master watched the service bot wheel away, easily turning left and right, avoiding large girths, billowing backsides and wayward thick shark tails galore, until it finally disappeared, though by then the Master's attention had shifted to a familiar sight heading in her direction. Velera, she saw, moved with as much urgency as her chubby body allowed and looked about her surroundings every other second.
Two months of the Behemoth's all-inclusive offerings had had a clear impact on her. Once lean and mean and with a backside so thicc and firm the Master couldn't help but "joke" about having done the math to guess how far a coin might go when bounced off it Velera was now sporting a chunky figure, backside no longer firm but doughy soft, that did much to fight against the hold her high-cut bikini.
"We observe the workings of the universe from afar." Was an old motto tutors at the Time Lord Academy loved to march out whenever students showed signs of questioning the orthodox (supposedly) underlining their entire society. The Master, for once, followed it to the letter watching Velera with her choice of swimwear showing off the dotting of hair/fur to be found across her body, the distinctive being the tuft between her main pair of breasts; the amusing detail her high-cut bikini didn't bother to cover was her three extra pair of breasts, which decreased in size the further down the pair were to be found on her portly girth; the thick trail of hair/fur starting at her navel and leading down to where she spied a cute little bulge of a stumpy cock almost lost to the overhang of her belly and plump fupa.
The Master refocused herself to the now. "VELERA! HELLLLLOOOO!" She called, loud enough to be both heard over the soft chattering of voices, suppressed moans and the pleasant tropical ambiance; splashing water, rustling trees, and bird song.
Velera's pointed ears perked up and her head snapped in the direction of the Master. Instant recognition was clear as day on her chubby face and a few moments later of lumbering steps and bumping guts she came to them.
With some annoyance and the familiar quality all wolvans possessed, voice deep and rough around the edges, she said, "Ya ain't seen my pack, 'ave ya? Were meant to find 'em 'ere."
The sun lounger groaned as the Master shifted heavily to sit upright, her body far fatter from the many days and weeks spent relaxing and unwinding, and met Velera's charred orange gaze. "Wish I could say I have but I haven't seen ear, nor tail, nor paw of anyone from your pack today. Hm. You might have gotten your decks mixed up. There are, after all, a great many leisure and pleasure decks for our enjoyment.
Velera made a quick scan of her surroundings again, head darting left and right with a wolf's focus, before she said anything else. "Et were definitely this one. There's a nuhce smell to the place."
"You wolvans really do put a lot of stock on a place's or person's scent," she noted, then moved herself that little bit more until the sun lounger would maybe just about allow two rather plump guests to sit on it together. The Master patted the empty spot next to her. "Since you're so sure, might as well hunker down in one place and hope they smell you out in a bit. I've ordered doughnuts."
The Master enjoyed how Velera's focus minutely shifted at the simple mention of food. It was the same for everyone aboard the Behemoth, what appeared to be a force of habit was a kind of conditioning to make the thought of food and other pleasures a difficult temptation to resist.
"I ought to….keep lookin' fuh my pack. Nothin' personal."
As if fate dictated Velera only had the illusion of choice in the matter, the service bot returned, carrying the Master's order. It offered the tray filled to the brim with doughnuts. “Your order, Miss Koschei.”
Velera eyes darted to the mound of sugary, fattening treats, powdery, juicy, sticky, oozy, goopy, no two doughnut even similar in the slightest. "Uh…is that for yaself?"
The Master murmured a delighted sound. "Oh! Just for me," she answered, then gave Velera a wink. "Or us, if you would do me the pleasure of your company while we wait for that pack of yours to show up."
A hazy look overcame Velera whenever she took a bite from her doughnut of choice, loosing herself to the taste and smell and texture of each one making its way into her eager gob; sharp teeth, distinct tongue, black lips.
A taste sensation was an apt description, thought the Master, licking the sticky goo from one doughnut to have coated her fingers, not wanting to let even one drop go to waste.
"Where's that friend of ya's, the bluhnde one?" Velera asked in the moments of clarity, reaching out to roughly grab another doughnut from the tray, before she would bite into one without care of how much of its creamy filling gushed from one end and onto herself.
The Master waited before giving the wolvan a reply. No point answering when Velera would be far too under the influence of food to pay attention.
"Well," she said, once she saw Velera swallow and focus return to her manner, "she's enjoying a bit of rest and relaxation on the botanical deck." She smirked, thinking of where the Doctor tended to go when visiting that deck in particular. "The part with all the food stands."
"Din't 'ave her as much of an eater when I first met 'er."
"She just needed a bit of-" she thought of Ie's methods to help a person discover their inner glutton "-encouragement to loosen up. She's always been tightly wind when taken out of her element." The Master pilfered a very gooey doughnut from the tray and offered it to Velera. "Donut?"
The wolvan took it without even needing a second of thought.
"Took a bit of convincing to get her there, of course, but she's enjoying herself now." She leaned over to Velera, felt the softness and warmth of their shared plumpness touch, and spoke with a mock whisper into their pointy ear, "I'm planning on taking her to one of Behemoth's pleasure deck facilities to help her really loosen up."
Velera raised and eyebrow and murmured a sound of great interest. The doughnut remained in hand, its gooey counting dripping onto her hand. "Ya mean the one with all 'em anthro stallion synths"
"They came highly recommended by an associate I know." The Master made a point to smile and lick at her two front teeth for Velera to see.
Ie had mentioned how often she made use of them when time allowed. "They are designed to be thorough."
The Master didn't need to feel the impulse of Velera's thought to know, the look in the wolf's eye told her everything. "Hmmmmm. You wouldn't have a word of recommendation for them yourself, would you, Velera?"
A knowing smile formed to reveal a sharp set of teeth hiding behind a pair of charcoal black lips. "Good at gettin' the job done," she said, and promptly stuffed the donut into her mouth.
The Master secretly smirked at the sight of the Doctor sporting such a plump figure born from a mix of loosening up and carelessness; sleeping well into the morning before getting up for breakfast; snacking whenever it took her fancy throughout the day; spending the evenings wherever she and the Master ended up parking their growing rears to eat, sometimes joining Jenevee and Clare, sometimes accompanied by Ie whose girth changed greatly in size on every occasion. All contained within a one-piece bathing suit that had an almost blinding choice of colours and patterns, bright and bubbly.
The Doctor was well and truly on her way to becoming a fatso butterball and didn't mind one bit. The heft of her gut, the jiggle of her bottom, the softness of her breasts, the thickness of her hips and thighs, the plumpness of her face, the tight fit of her bathing suit stretched so tightly over the growing flab the Master couldn't help but imagine the day it would give out in one go.
It was a thought that made her burn with excitement.
With heavy and slow steps, the two lumbered through one of the Behemoth's pleasure centres, all neon light and bright colours and in your face signage that made the Doctor's bathing suit appear devoid of colour by comparison. The Master would be lying if she said the extra weight gained hadn't begun to impact her as it did Doctor in small ways, the odd moments they found themselves out of breath or the incessant chafing of their inner thighs.
A hustle of other guests roaming the district and alluring music pulsing from venues mingled in the background of the entire place with its layout evoking narrow streets.
The Doctor peered at the signage on display in all directions and tried to look disinterested rather than drawn to some of the more explicit bits of imagery rendered in flashing neon lights.
"Ay," she said with a kind of airiness born from distraction, eyes never quite pulling away from everything around them, "where you're tryin' to take us today?"
The Master wagged a thick finger. "Ah. Ah. Ah. It's a surprise you'll come to enjoy as much as you're enjoying yourself now."
"I ain't….enjoyin' myself that much," she said, though it lacked the conviction that would've been overwhelming when she first arrived. Now it was a perfunctory reply, harmless and a rattling of a sabre meant for show than intent.
The Master could taste the wavering in the Doctor's thoughts, how she was less focused on making it back to the TARDIS and drawn more to the thought of getting a nice bit of grub to eat, which tended to spark her own appetite, and right now all the signs promising a swell time.
"I'm sure you're going to all those activity sessions is for show, then."
"It's somethin' to do. You should try it instead of spendin' it laying around at one of them themed pools or, uh, beaches."
"I enjoy the view. There's something enlivening about doing nothing all day, Doctor. Just letting yourself melt into the moment."
"Sounds borin' to me bein' in one place for that long."
"If you can learn to enjoy-" she smirked at the look to cross the Doctor's plump and sweaty face before it softened back to something close to amusement "-to be stuck aboard the Behemoth, I think you're very capable of learning to enjoy basking on a sun lounger for a few hours, or spending time in new company."
"This ain't another meal with Ie, is it?"
"Nooooo, but I'm sure she would've loved to have joined us for this if I had asked."
In the place of assertive scrutiny was passive curiosity for the Doctor.
"Master? What you got in mind for us?"
Ahead of them, only a minute's more walk, among all the signs and venues crowding in on guests from either side, the Master spotted the place she had in mind for her and the Doctor. Its neon sign was difficult to miss with the three-frame animation of a buff anthro stallion starting out with a flaccid dick and ending with them sporting a hog of a cock.
It went unnoticed by the Doctor.
The Master made a noise of amusement and put a finger to her lips. "Shush. What's more fun than the great big juicy unknown, Doctor?"
The Doctor let out a light laugh and the Master felt a stirring of old memories try to take shape but were faded beyond recognition. A memory gone, very little a feeling remained, and the Master laughed it off as she thought of what awaited them.
There was an aroma of scented oils, soothing and warm, in the room the Doctor and the Master were told to take a seat in. It was was decorated with tapestries hanging everywhere to create a sense of a maze one could freely pass through the walls of, making the room feel both large and small. Light, wherever the source of it came, glowed softly as it passed through the thinner tapestries, casting a web of shadows of varying depths and contrasts.
The Doctor and the Master were sat on one of the several couches to be found in the middle of all this.
The Master bit at her bottom in anticipation at the six beefy anthro stallions standing in the room with them, forming a half-circle, all naked, all oiled up, all looking at them with casual interest.
The Doctor looked at the sight with whatever fumbling caution remained in her mind as it was told and encouraged to relax from the smell of the place. Sit. Relax. Don't worry.
"Ain't you two a pretty pair comin' on in here for some fun," one of the stallions, beefiest of the six, said with a casual drawl.
In the misty depths of an old life a thousand times removed from the now, the matter of regeneration had always been discussed in the most clinical and academic terms on Gallifrey. Never did it venture into something more poetic and flowery to describe how one would experience a regeneration and what was expected of others to care for them afterwards. You were expected to understand it and go from there when it happened.
All things the Doctor, if she remembered it in any great detail a thousand lifetimes removed from it, had been bored to tears by.
On the underbelly of Gallifreyan society and within the nooks and crannies of the Time Lord Academy, there were a few who had eclectic and esoteric perspectives and philosophies on the matter of regeneration.
One school of thought believed it important to discover what a new incarnation's physical likes and dislikes were first and foremost. "The small changes will help tell you a great deal about yourself and understand who you have become."
The Doctor had not really taken the time to discover those likes and dislike for incarnation's body. From the moment go, smashing through the roof of a train carriage (dislike) and setting eyes on Yasmin Khan (like) for the first time, there had been very few opportunities to freely explore herself and really dig into what made this body tick.
Pears (dislike). Custard creams (like). Those were obvious. Everything else that wasn't them or Yaz (really like) were a complete mystery.
So maybe, on some level, ending up trapped on the Behemoth with the Master had been a blessing in disguise, the first real chance to explore what this body's business was all about.
It hadn't occurred to her one of those things might be how seeing a group of anthro stallion synths (like) would leave her feeling incredibly hot and increasingly bothered, and wondering whether Yaz would've found this up her alley if she were here.
The Doctor glanced at the Master to see her in profile and for one second imagine it were Yaz before rushing back into the now. It was the Master, wearing her face, using her voice.
The lead stallion raised an eyebrow and said with laid back tone, "Well? Can we be helpin' you two with somethin'?"
"Oh! You bet!" exclaimed the Master and looked at the Doctor in excitement. "Can't they, Theta?"
One of the stallions, who had more of a beer belly middle but still beefy all over, looked at the Doctor and gave her a polite nod. "Cute little name for one like yourself, Theta?"
"It's, uh…actually-" so one of her body's likes was definitely a buff sextet of stallions looking down on her and the Master, all naked as the day they were put together, parts of interchangeable and adaptable "-Doctor."
"Don't mind if we be callin' ya Doc, do ya, Doc?
The Doctor audibly gulped and the Master tried to keep herself from smirking. It was hard, especially with how the Doctor's thoughts grew hot at being called Doc by this stud muffin of a stallion. "Well, do you?"
"Depends….how….uh…well you know me. Can't say I know any of you at all, havin' just got here and-" she looked at the Master, then back at the sextet of stallions, feeling something deep at her core being gently stirred with the tip of a knowing finger, round and round, slowly and slowly, all those eyes resting on her and the Master, brimming with a kind of detached amusement at who had wandered into their abode "-not being told a thing about what you lot do."
"I be thinkin' all of us are gonna be very well acquainted soon enough by we be doin' to ya and each other…..Doc."
Another burst of hotness in the Doctor's thoughts danced with the Master's own.
"Don't go forgetting about me," said the Master with a false pout. "I'd hate to be left out of the fun."
A look passed between the stallions. "We'd be hatin' to leave anyone out of the fun."
The Doctor clasped and unclasped her hands several times, gaze shift from left to right, seeing one grab the muscular ass of the one next to him, seeing the twitching of flaccid members begin to harden, feeling her body usually so cool grow warmer by the second, hearing the chuckle of another stallion as one brought an arm around his broad shoulders and leaned in to kiss on the lips and taking hold of their own cock to rub. "Uh…oh…that's a corker," she murmured, "….Master….what kind of…place is this?"
"A place for us to have a bit of intimate fun with these very nice stallions….Doc," she said and tensed up at the growing impact of the Doctor's thoughts with every utterance of Doc. "You're free to leave….if you want."
The Doctor did not move her rump from the plush couch, instead she shifted her gaze from the Master to the stallions and back to the Master who looked at her with a cocksure grin.
The lead stallion moved, leaving the rest to start having their fun with one another, until he came to stand right in front of the Time Lords. His girthy cock now a half-chub and difficult to ignore. "I be thinkin' you two might do me a favour by checkin' if I'm in workin' order for your tastes."
The Master ogled the meaty hog of a dick. "Oooooo! I haven't had one of these for years," she said. "How long has it been since you had one, Doc?"
The Doctor was positively flustered by the sight of the member growing harder by the second and how the stallion towered over them, all the while giving them his most laid back smile. "Haven't given…it….much thought," she stumbled. A new kind of hunger was starting to take shape, her body craved an experience, with the same kind of want stuffing her mouth with food now brought her day and night here.
The Master licked her lips and looked up at the stallion. "Betcha it wasn't anything this big, I'm sure of that. Don't mind if I?" She pointed at the stallion's cock.
"Name's Barten, if it helps you some," he said with a nod to the Master and then to the Doctor. "And you can do whatever it is that pleases ya."
The Doctor watched the Master turn her attentions to Barten's girthy, hardening cock, though her manner was marked by an amused interest from the way she took hold of it with one hand and fondled at his fist sized balls with the other, gauging their size and weight.
Barten appeared to be amused himself at the Master's decision to poke and prod at it than go all in.
Behind him a stallion turned his attention onto his companion's firm nipples with a bite, causing him to let out a throaty groan. "Ya gonna pay for my repairs if you get too rough like last time," he said, but didn't stop them from giving it another bite.
The Master's eyes lit up, hands still working the cock and balls. "We've got ourselves a twenty-five pounder beast here, Doc."
"Doctor," she mumbled, not even trying to look anywhere else but the Master giving the dick a good bit of hands-on attention, practically transfixed by what was unfolding right next to her and a great wave of sensations bubbling away between her thick thighs. "Think…I rather….rather…." she swallowed, she licked her lips, she stared for the longest time at foreskin pulling back with every inch it gained until the head bulged out and all she could think about was how the Master gazed at it adoringly.
The Doctor squeezed her thighs together and felt a sticky wetness form between her swimsuit and cunt.
Yaz' lips. Yaz' eyes. Yaz' tongue. Yaz' hands.
The Master looked up at Barten and joked, "She's usually such a motormouth." Then turned her attentions back to the now fully erect cock pulsing and bulging with a flood fluids to make it so hard. "Think you deserve a mark of approval," she said and, eyes locking with the Doctor the whole time, pressed her lips to give the firm head a kiss.
Barten, for the first time, let out a low groan. "Ya certainly have a unique way of showin' ya approval."
A taste of the Doctor's thoughts struck the Master so hard it almost took her right out of the moment, but only managed to cause her to abruptly pull away from the throbbing head, leaving behind the clear mark of lipstick in the finest shade of deep crimson.
The Master needed only a second to collect her thoughts back into place to give Barten a coy smile, placing a forefinger on the tip of his cock and beginning to make little circles around the lipstick mark. She looked at at the Doctor. "Something….you like, Doc?" She asked, voice filled with delight and control. "Well?"
A growing mix of moans came from behind, five stallions, finding a pace, kneeling down, mouth full, hands busy, bodies glistening with scented oils.
Barten licked at his lips. "Don't want to go rushin ya or anythin, but ya keepin' us waitin."
A clearer head, fresh aboard the Behemoth, would have never even entertained accompanying the Master anywhere at her suggestion. But the Doctor's head was marked by two months of snacking and eating and developing cravings to discover more and more about this body.
What it liked. What it wanted. What it couldn't tolerate to be without.
Yaz' eyes, rich brown. Those lips red with teasing lipstick. The hand beginning to work the hog of a cock and the other reaching out to her. The smell of oils and aromas filled her head.
This was why companions were good. They kept her grounded and in check. No companion, nothing to keep her grounded and in check.
The Doctor sucked back on a mouthful of spit and swallowed it.
"I'm the guilt free option. Diet Yaz. Same great taste, none of the emotional baggage, and everything you are gagging for."
"Come on, Doc," said the Master, hand on the back of her thick neck, "we might have all the time in the world to waste but Barten doesn't, he's got other bookings, don't you?"
"Ya got us booked out for the whole afternoon and most of the pretty old evenin'. Fancy somethin' for that motormouth of yours, Doc."
Barten reached down, room filling with the sound of flesh touching and rubbing, to have his hand join the Master's and bring the Doctor in close and personal to his manhood. His other stroked at the back of the Master's head.
"Gettin' awful….hard to keep myself from runnin' ahead of you two."
A twitch of his cock attested to the growing pressure and balls firming up with an artificial rush of chemical to produce an amassing load, the Master's hand stroked it thoughtfully, fingers barely able to grip it fully with its arm thick girth.
"Master….din't think you were so….uh….smutty." The Doctor's mind wandered off track. The look in Barten's pale purple eyes, the rampant mass of fuckery unfolding behind him, bodies shimmering in oils, body thriving for more, the Master waiting with a cocksure smile half-obscure by the cock between them.
The Master gave Barten's cock a slow lick before she answered, eyes locked with the Doctor. "What was it that one old coot at the Academy said about discovering what our bodies liked after regeneration?"
The Doctor couldn't recall the exact words, her head was circling around and around the thought of what Barten's cock would feel like, glistening and smelling faintly of coconut oil, eyes picking out all the little details of it, mouth so desperately empty to be filled.
"Somethin' about…." The idea eluded her, braincells drowning in an ocean of imagined spunk and sweat and slop. "Takin' the…plunge."
A withering of moans and "Come on!" filled the room, all while Barten bit hard on his bottom lip as the Master's hand continued to work him slowly and thoroughly.
"Close enough," said the Master, finding the Doctor's haziness almost infectious, spilling over to become just as much her own impulses as they were the Doctor's. Sometimes having telepathic abilities a few notches better than most on Gallifrey could be a detriment, but here, feeling the bubbling of sensations brewing at the Doctor's core and letting newfound desires take the lead made the downsides worth it.
Without the need for Barten's encouragement, the Master and the Doctor moved in to have their fun.
A musky odour of sweat and cum mingled with scented oils.
Embers and sparks of old memories mostly lost to the annals of history exploded and flashed, how they were once, the Master rough, teeth, possessive, keen to leave a mark on their prey.
The feelings of those moments joined in the chorus as the Doctor became desperate to ride the constant high her body craved with every twitching climax.
With a rough plap and jiggle of flesh riding a titan of a cock, the Master slammed herself down hard and fast, hips rising and falling, and let out a hearty laugh and lustful moan. Her bikini had long been torn off and the Doctor's swimsuit barely clung on, pulled down to let her dough breasts and large belly be free while the lower half remained but pulled aside to let the stallion eat and eat and eat on her raw cunt.
The Doctor didn't have the brain power to focus on anything, not even the soft touch of the Master's lips touching her own and taste of their tongue, as the stallion beneath her and the Master pleasured her with the kind of skill expected from a synth designed and programmed to give a whirlwind experience to all manner of lifeforms in the galaxy.
The Master tasted the neediness for more and did everything she could to keep it that way. Who cared if she was getting lost in the moment herself, feeling the cock stretch her painfully tight, aware of the stallions whispering away how eager Doc had become.
You're mine, Doctor, she thought.
Writing a Doctor Who fanfic, weight gain or not, including a bunch of buff stallions has always been something I've wanted to do and Behemoth offered the perfect excuse to do so.
For anyone who's reached this part of the post, if you fancy the chance of having a prompt idea written up into a fanfic, I'm celebrating hitting one hundred watchers by accepting watchers and non-watchers prompt ideas until the 21st of this month (November - 2025) on this post: Milestone Celebration Post (100W)! Fanfic Prompts!).
Got an idea for the most out of this world crack!ship fuelled NSFW crossover involving a lot of weight gain? You leave 'em, I pick 'em, I write a fic based on 'em.
