Dr. Fang pushed open the door to her office, followed closely by her nephew. Both were gray wolves, but in contrast to Fang's long silver hair, Ady had his father's black hair with a single red streak that hung over one eye. It had been Boony's idea for Fang to take Ady to work and show him around before he went to college, but Fang certainly didn't mind the chance to liven up her workday a bit. Both she and Ady had open-fronted lab coats on over their normal clothes: a dark gray tank top and jeans for Ady, and a button-up shirt and slacks for Fang. Dr. Fang also had her ID badge clipped to her lab coat, but Ady only had a visitor's badge with no picture on his.

"And this is my office," Dr. Fang informed Ady with a gesture, "Though I'm in the labs or examination rooms most of the time!" It was fairly normal as offices went, at least at a glance: a big desk in the middle with bookshelves to the sides; posters, certificates, and her diploma on the walls; and a filing cabinet in the corner. Though a more astute observer might eventually notice that the anatomical diagram posters featured a woman with H-cup breasts and a man with a dick reaching his knees, and that one of the certificates read 'For leading contributions to the field of genital enhancement'.

"Uh-huh," Ady replied absently, barely paying attention. Walking around a medical facility wasn't exactly his idea of fun, especially during the summer break after graduating high school. He'd much rather have been outside.

Dr. Fang snatched up a clipboard from a tray secured to her desk and looked it over. "Busy day today," she observed, looking over her schedule. "You'll get to see me at my best! Let's see, first up... ah, a first time session. Perfect! You can help me with that one, actually."

"Uh-huh," Ady mumbled, then belatedly realized what she had said at the end. "Oh, uh, help how? Like, taking measurements and stuff?"

A smirk crossed Dr. Fang's face, too subtle for him to notice. "Not exactly," she replied vaguely. "Come, let's head to the treatment room and get set up before the patient arrives."

She led the way and Ady followed after her, getting briefly distracted by a vulpine nurse with enormous breasts walking past him. He nearly lost track of his aunt but quickly caught back up, soon reaching their destination as Dr. Fang opened up the door and waved him inside. Much like her office, at a glance it seemed normal, with a medical table up against the wall, a sink, drawers, a swivel chair, cabinets, posters, and a small fridge. Someone more attentive than Ady might have noticed that one of the drawers was labeled 'milkers', or that one of the posters showed a set of exercises specifically for women with hyper-sized breasts, next to another one illustrating cup sizes all the way to M.

Dr. Fang opened up the fridge and peered inside, plucking a pair of test tubes from a rack on the top shelf. "Here, drink this," she told Ady, holding one of them out to him.

"Uh, why? I'm not the patient," he replied in confusion, taking the test tube nonetheless. The clear fluid inside could have been anything, and the label just had a number on it that meant nothing to him. He held it up to the light, but it didn't look any different.

"No, but you will be my assistant," Dr. Fang elaborated, popping off the stopper and knocking back the liquid inside in one gulp. Ady didn't understand, but did the same, wincing and shuddering for a moment from the weird taste. He handed the empty tube and stopper back to his aunt, and then looked down as he felt a weird tingling in his balls, but just as he was about to bring it up, the feeling went away. Maybe it was a coincidence...

"So, what did that do?" Ady asked, only to be interrupted by a knock on the door.

"Come in!" Dr. Fang called out, holding a hand to Ady to indicate for him to keep quiet.

The door opened to reveal another nurse who handed Dr. Fang a clipboard, followed by an unusual creature Ady had never seen before. They were mostly a pale gray with pink hair, and a long tail that ended in a tuft of white fur like a lion's. But their eyes were a solid deep pink with white specks, they had no nose and their ears were pointed, with the long eyelashes being the only clue Ady could pick up on that the new arrival was female. She was wearing just a pink and black t-shirt with a black pair of jeans, but the curve of her chest was minimal, to put it kindly.

"Welcome... Mystic?" Dr. Fang said as she read off the clipboard.

"That's me," Mystic replied in a feminine yet slightly otherworldly voice, looking over at Ady. Or so he assumed, he couldn't really tell where she was looking besides where her head was pointing.

"This is my assistant, Ady," Dr. Fang introduced him. "He'll be helping me with the procedure today."

"Hi," Ady offered, giving a small wave. He still had no idea what his aunt wanted, but hopefully it wouldn't be too complicated or involve any math.

"You've been informed of how this will work?" Dr. Fang went on.

"Yes," Mystic replied with a nod and... a blush? "I was told it would be very effective."

"Oh, it will be. Take a seat," Dr. Fang instructed. Ady began to move, but his aunt quickly reached out with one arm and put it across his chest. "Not you."

"All right," Mystic agreed, sitting in the swivel chair facing them. "Will this hurt?"

Dr. Fang shook her head. "Oh no, quite the opposite!" she replied mirthfully. Glancing at the clipboard again, she hummed in thought. "This will require us to administer more than one dose for the improvement you want..."

"That's fine. I'm just... tired of being so... flat!" Mystic moaned, and Ady tilted his head in confusion. What was she on about?

"Very well then, take off your shirt and we'll get started."

Ady was even more perplexed to see Mystic comply, tugging her shirt upward and off her body entirely, tossing it onto the examination table. She barely had any breasts at all, only just marginally enough of a swell to be A-cups, with bright pink nipples in the center. He started to see where this was going, but why had his aunt given him the test tube instead of Mystic? Dr. Fang did open up a drawer and handed a tub of something to Mystic, with the instructions to "Apply this to your areolae," but where did he factor into it...?

While Mystic was rubbing some of the cream onto her nipples, Ady turned to Dr. Fang to ask a question, only to see that she was busy undoing her pants. Seeing him staring as she unzipped, she told him, "Come on, Ady, you can't administer the dose with your pants on."

Gears turned in Ady's head as he grasped exactly how this procedure was going to work, his thoughts confirmed further when Dr. Fang dropped her pants to her ankles and started stroking her cock. "Oh wow!" Mystic exclaimed at the sight; Dr. Fang's pants had been concealing the bulge of her two-foot-long shaft and bowling-ball sized testicles. She let out a gasp and another "Oh, WOW!" when Ady hurriedly opened his jeans and shoved them and his underwear down as well, letting an equally impressive endowment flop out into the open. "You're both huge!"

"It runs in the family," Dr. Fang remarked with a chuckle. "You should see his father! Now, Ady, just follow my lead."

"R-right!" Ady blurted out. He'd been expecting a boring day of watching machines or writing down measurements – this was a lot more interesting and motivating. Gripping his cock in one hand and rubbing his balls a little with the other, finding that his sack felt noticeably warmer than usual, he stroked his shaft until it was standing at full stiffness, and he drew close to Mystic just as his aunt was doing.

"Hold still, please," Dr. Fang told Mystic. The wolfess put her left hand on Mystic's shoulder and held her cock with her right, pushing the tip up against Mystic's right nipple. To Ady's surprise the head managed to penetrate, the teat stretching out to engulf Dr. Fang's glans, making Mystic give a gasp. Ady was quick to follow suit, making Mystic give a short groan as he felt his cockhead get engulfed by the tight confines of her tiny breast; the cream she had applied must have let her take the insertion.

But that was the problem: her breasts were TOO tiny. Fitting his bulbous tip into her was about the limit of what she seemed able to handle. It was a problem Dr. Fang noticed too as she tried to push in deeper, finding herself unable to. "Hm. Well, not to worry, I'll just need a little help from you, Mystic, if you would be so kind..."

"What do you-" Mystic began, but Dr. Fang simply lifted her hand off of Mystic's shoulder and made a jerking motion with it. "Right!" Mystic agreed, reaching out to grab hold of the dicks that were penetrating her nipples, and began stroking them rapidly. Ady moaned out, though Dr. Fang gave a more stoic hum.

It was hard to resist the urge to thrust, but if he tried, Ady would have just slipped right out of her. He put his right hand on Mystic's shoulder to steady himself like his aunt had done and did his best to keep still, enjoying the handjob. This was a great surprise! The tingling sensation in his balls returned as he started to leak precum, but it was a much more pleasant tingle this time, and he just huffed and took heavy breaths as Mystic's hand stroked back and forth, picking up more speed as she jerked off him and his aunt together.

He glanced downwards after some time and noticed that, while it was only a bit, Mystic's breasts were ever so slightly larger. Still not really enough for him to thrust into, but if his precum was doing that, how much would his cum be able to do...?

"Faster, please," Dr. Fang said, and Mystic sped up for both of them. Ady's eyes rolled up a little and he groaned, leaning forward a bit.

"I'm... I'm gonna blow..." he murmured, feeling his climax approaching.

"Stay inside her, don't waste any," Dr. Fang told him, taking a sharp inhalation of breath that indicated she was getting close as well.

"Guhh... I'll try..." Ady managed to reply, gasping and groaning briefly before he hit his peak. His cock throbbed and his balls pulled up as he started to unload, a thick blast of cum erupting into Mystic's left breast. She let out a moan of her own, but Ady was lost in the pleasure, too overcome to notice that her tit had bulged out and grown from the cum he had fired into it. Another rope of his jizz swelled her breast out further, and he barely registered feeling the tightness of her teat moving down his cock as it engulfed more of his shaft.

Dr. Fang blew quickly thereafter, her composed demeanor disappearing as she hit her climax. Moaning out loudly, she grinded up against Mystic firmly as she came hard, the seed that pumped through her cock making Mystic's right breast quickly catch up in size to the left one. Mystic gave a long groan as she felt both of her breasts getting filled and growing in response, her tail lashing back and forth as she stopped stroking their cocks and just held them steady. She could feel their urethras swell out with each pulse of cum that went through them, every additional burst making her tits bigger than before, the intense sensation starting to make her dizzy...

Ady finished first and swayed on his feet a little, only for Dr. Fang to reach out and put a hand on his back to steady him as her own climax tapered off. Mystic looked down and cupped her breasts, previously so small as to barely qualify as such, and now they were healthy D-cups, perhaps even double-D's. She held and stroked them in wonder, feeling the wolves' cocks still inside them, and though she felt satisfied... why stop there?

"How soon can I have the next dose?" Mystic asked, looking up at Dr. Fang.

The doctor smirked, giving a chuckle and patting Ady on the back. "As soon as my assistant here is ready for another round," she answered, and Ady's ears pricked up. "Which shouldn't be long thanks to the serum we took... perhaps if you gave him some encouragement?"

Mystic picked up on the doctor's meaning, and Ady felt her stroking his cock again. Despite the fact that he had just blown an enormous load, he felt his cock, halfway to flaccid, already stiffening back up, and he didn't feel the normal oversensitivity right after an orgasm. "That will do," Dr. Fang told Mystic once both of them were erect again, and patted Ady on the back. "We'll take care of it this time, give your hands a rest and just hold up your mammaries for us, please."

Even though Mystic's breasts only held about half of Dr. Fang's cock, it was plenty for her to begin thrusting, with Mystic keeping her hands under her tits to hold them still. Ady followed her lead, pulling his hips back and drawing his cock out of her breasts partway, then slid back inside, going slowly at first until he had a good rhythm down and could start to speed up. "Oh, fuuuck..." Mystic moaned out as both wolves fucked her tits, her nipples stretched wide around their cocks, feeling them pounding in and out of her at different paces; Ady kept getting faster, while Dr. Fang was going for longer but slower motions of her hips.

Ady kept a firm grip on Mystic's shoulder, shoving his cock into her left breast again and again, his balls swinging back and forth between his legs as he went all-out on her. When he came again, it was even more intense than the first time, and he shuddered in place and moaned out along with her as he pumped thick, hot ropes of cum into her breast, making it swell out even further. His aunt soon came as well and moaned out in bliss as her own heavy sack unloaded, every blast of seed into Mystic's right tit making it wobble and expand further, even the nipple getting a bit bigger as the enhancement worked on her.

All three of them panted for a little bit, taking a moment to recover. Mystic's breasts were much larger now, pressing against each other and even bigger than basketballs, able to hold the entire lengths of the cocks inside of them. It was Dr. Fang who broke the silence to simply ask, "Another?"

"Please," Mystic gasped out.

Nodding, Dr. Fang reached down and grabbed onto Mystic's right breast with both hands, holding it steady as she started to thrust once more, pounding at it heavily. Ady copied her, but he wasn't in sync with her; when she thrusted in, he was pulling back, and when she withdrew, he was slamming his hips against the huge, soft breast he was gripping. Mystic certainly didn't seem to mind, her eyes rolling back as she moaned out, her hands gripping the armrests now that she no longer needed to hold her tits up for the two wolves.

It was Dr. Fang who was making the more rapid thrusts this time, and she drifted in and out of sync with Ady as they kept fucking her chest; sometimes she pounded away in time with him, and at other times alternating. Every time one of them rammed into her all the way, their potent balls slapped against the bottom half of her breasts. And Dr. Fang was the first to erupt this time, hilting inside of Mystic's breast and bloating it to an even greater size with another heavy load of cum, though Ady wasn't far behind her in blowing just as much thick jizz into her other tit to keep her balanced out.

In the wake of the third round they were all panting heavily, and Mystic's tits were now big enough that they could rest on her lap. "There... that should do," Dr. Fang murmured, starting to pull out.

"One more," Mystic insisted between gasps for breath, reaching out and grabbing onto Dr. Fang's hips. "Just one."

Dr. Fang paused, then chuckled. "Ady?" she asked, and in response, her nephew pulled his hips back and began humping Mystic's breast once more. "I suppose that answers that," Dr. Fang remarked with amusement, and rested both hands on top of the breast she was buried in as she began fucking it again.

With no-one holding her tits in place, Mystic felt them wobble heavily with every hard thrust the wolves made against them, those immense mounds now large enough to take the full lengths of their cocks even when they pushed hard enough to indent them somewhat. There was little rhythm to either of them now, and they synced up only incidentally as they sped up and slowed down as their tiredness dictated, overwhelming Mystic with the constantly changing pleasurable sensations.

When he felt himself getting close, Ady put on a burst of speed and humped harder and faster until he came, shuddering heavily and flooding Mystic's breasts with even more of his cum. Dr. Fang took her time instead, letting the moment last a bit longer so that she hit her orgasm just as Ady's was finishing, making Mystic's breast wobble about with every thick gout of cum that was pumped into it, swelling it to match the other one.

All three panted heavily afterwards, and Mystic shook off her daze to admire her beach ball-sized tits. She was going to need some new clothes, but maybe these two could help her out on that front...

"That will have to be enough, I have another patient in ten minutes," Dr. Fang murmured. "Ady, you'll help me with that one too, yes?"

Ady's eyes shot open. "Yeah, totally!" he declared enthusiastically. If this was what working at this place was like, maybe he'd have to ask his aunt to land him a job!