"You've had quite the adventure since leaving here, haven't you?" Beverly tittered as she removed the blood pressure guage from Shar's thin arm. The black-and-white bovine was kind, giving a gentle reprimand while reestablishing her canine patient's vitals, but she did not mince words.
"I-I guess," Shar muttered, the boi nude and blushing again, this time because he'd awoken to three cooing, awestruck nurses carefully bathing him at the OmniMed hospital. It was more embaressing than surprising, being again in the clutches of a nursing staff that couldn't get over how cute his feminine boi form was.
"I didn't think it neccesary to have to tell you to take it easy," Beverly continued, her professionalism shining even as she carefully placed her stethescope to Shar's back. "Mabel and Katie may have had their fun but the events at that photoshoot? Goodness, you didn't just walk the line, you danced on it. Who knows what Euphemia's pheramones could have done to your hormone-sensitive state?"
"I'm sorry..."
"Well... don't be. Actually, her delivering you and that handsome colt here saved us the trouble of looking." The bovine physician/research head tittered again before adding, "Actually, the colt's helped keep a healthy portion of the nurses distracted. One adorable boi patient is one thing but a charming boi model as well? They can't decide who to oogle more. <3"
Shar endured the talk and the examination, guilt weighing heavy on his heart. Kacey was in the room with them, seated beside the exam table Shar was perched upon with love and concern in her eyes. She had forgiven Shar in a heartbeat after hearing her fiancee had been admitted again, bursting in on the spongebath and shooing the squealing nurses out so she could attend to her mate herself. There was no animosity, no anger from the hybrid. Just love, pure and unquestionable. But that didn't ease all of the guilt Shar felt for all his 'adventures', as Beverly put it. He felt like he had betrayed the one he loved most, first by keeping the transition-reversal incident a secret and then by giving in to the heat of a moment with a well-hung colt boi and a massive dragoness. His head hung low, his bronze mop of curly hair hiding his eyes until Beverly spoke again.
"On the plus side, we may have found the solution." Shar and Kacey's heads shot up in unison. "It's going to be tricky, however."
"How so?" Kacey asked, the OmniMed engineering in her blood flaring to the surface to process the solution.
"Well," Beverly began, "as hard as it sounds, we'll have to seperate you two again. Just for about twelve hours, mind you, this is going to require a lot of hands-on focus from our staff. You'll be brought in at the appropriate time to help catalyse the cure but until then... we'll have to edge Shar."
"What?" both muttered as one.
"Edging, slightly similar to chastity in that you'll be kept from orgasming until the proper time. Teasing is another term for it."
"Why is that neccesary?" Kacey asked, taking Shar's paw in her own and squeezing.
Beverly nodded in sympathy. "I know it sounds bad but I hear it can be quite pleasant. The idea is to bolster Shar's production to his absolute maximum and beyond, as much as we can in the space of 24 hours. At which point, we will administer a special hormone cocktail before finally letting him fully loose. Once returned to his normal state, the post-orgasm samples will give us the data to more easily replicate the cure should something like this happen again to Shar or any of our trans patients."
"And... this will work?" Shar asked meekly from the table, blushing deeper.
"In theory," Beverly admitted. "You are the first patient of ours to experience something like this, after all. But it is the safest course to take. What do you say?"
They were quiet for a moment, the engaged couple holding each others paws tight until Kacey's expression brightened. "We'll do it!" she chirped and blushed in a way Shar recognized: it was the expression Kacey made when she had a Dio-style idea in mind. "Actually, I have a better idea on how to edge him. <3"
"Do tell. <3" Beverly cooed. 

***

The rational voice in the back of Shar's mind made a note that while Kacey had forgiven him ealier, this still must have been devised a lesser sort of punishment. However, that part of the canine's mind went unheard as he was not in the usual state of mind, but rather something more primal. Kacey's idea was met with cheers by Beverly and soon Shar had been escorted to a private room where the plan would be put into motion. Inside the room was Sasha, the handsome colt wearing only the tiniest speedo that just barely contained his equine maleness but with his mane frweshly brushed like he was getting ready for another modeling gig. He was smiling kindly at Shar, a bit of shared pity for what they were about to endure and especially at the sight between the smaller boi's thighs where the red ribbon Kacey had tied kept his member tightly contained in his golden sheath.
"Ready?" the colt asked softly, placing a palm on Shar's cheek.
Shar blushed and nodded slowly. "I-I think so. You know, um... you know what to do?"
This time Sasha blushed and nodded, lifting the plain white collar and leash in his other hand. "More or less. This is going to be a few firsts for me."
"I'll find a way to repay you," Shar blurted, his big eyes glittering up at the colt. "I don't know how but I'll repay you f-for helping me so much."
Sasha smiled and kissed Shar's cheek. "Don't worry about it, pup. You've made these last couple days a lot of fun. Now... who's a good puppy? <3"
Click.
The collar went on and Shar's mind flipped to the feral side, the lovable pet state of mind motivated by love and praise. Any and all worries faded away and Shar dropped to all fours, panting with his fluffy tail wagging wildly. When asked if he was a good puppy he let out a high-pitched whimpering and then a soft bark. His little heart beat so fast when the colt praised him and pet his poofy mop of hair. He then gave the leash a gentle tug and beckoned, leading Shar out of the small room and into a common area filled with adoring nurses.
Sasha's ears rang when the collective squealing died down and gave way to awestruck cooing. The nurses, small females and bois alike, were all wearing their OmniMed uniforms but were happy abandoning their duties to oogle the fit and stunningly handsome colt boi leading an impossibly cute puppy boi on a leash like his favorite pet. No one asked to touch Shar, they all just did, petting and ruffling his curly hair and squealing over and over each time Shar gave a happy bark or cute little whining. So much praise, so much love, Shar was in puppy heaven. Eventually the exploring paws reached towards Sasha as well and he struck a sultry scolding pose, like a pretty boi with a bad attitude.
The delighted squeals told him it worked on some more than others.
Shar lost track of all time amidst all the attention, so full of happiness and obeying any command given as long as it guarneteed more praise and petting. But it didn't take long for the nurses to abandon pretense and get to the action they wanted. Sasha's thong was lost at some point and he was like putty in the nurse's paws, the sheer number of digits stroking his equine length driving him nuts. Even Shar was starting to whimper as his cock strained against his confined sheath, the paws stroking his golden orbs and tender nipples getting him excited.
At some point the bois became seperated in the sea of horny nurses, Shar left alone to whichever nurse was holding his leash. Upon learning that Shar's package was off-limits by order of their supervisor, Beverly, the bois were made into two different 'service stations' as it were. Sasha was helpless, two nurses sacrificng their stockings to fashion bindings, tying the colt to a chair with his legs spread wide, allowing any two nurses at a time to give his equine orbs a little loving while one lucky nurse would get thje priveledge of riding his thick equine cock. He was quite popular for a while, the females hogging him for themselves, drunk on the intensel pleasurable feeling of a cock filling them almost to the brim. Another nurse offered her panties, forming a crude gag so they could all enjoy the girlish little whimpers he made as nurse after nurse rode his cock until they were satisfied.
Shar was a different matter, one that took time to take the popularity place from Sasha. Without his own knot available, one got the idea to try a little cunnilingus, not knowing that both sides of Shar's psyche (the normal and the pet sides) were both very keen and skilled in the task. While he could not bury his shaft in the female mouse spreading her legs, he would be more than happy to give her a good, hard licking.
And that's  just what Shar did.
His efforts gained attention as nurse after nurse was brought to a screaming orgasm again and again, wrapping his thin arms around their thighs and planting his muzzle over their crotch. His canine tongue worked wonders, stimulating all the right spots and being rewarded every time by screaming praise and a lovely gush of love honey. Soon the females were getting regular turns with Shar, leaving Sasha mostly with the boi nurses who removed his gag and would kiss the colt passionately even while he was bound, bouncing their cute heart-shaped rumps on his member. No one realized that nearly twenty hours had passed, not until Kacey finally entered and pulled the beleaguered nurse off her finacee, Shar a soaked mess panting with his muzzle open after all the oral.
"My precious puppy, <3" Kacey cooed and kissed Shar, embarcing her beloved while taking hold of the leash.
"It's time," Beverly's voice spoke over the afterglow of the room, exhausted nurses in a variety of undress scattered over the floor. "He must take the cocktail."
"But it hasn't been 24 hours," Kacey retorted, still hugging Shar close. "Are you sure?"
"He's at his limit, any more edging could be dangerous. Give him the cocktail... and hold on tight. <3"
Shar didn't see the vial in Kacey's hand but didn't hesitate when he was given the order to drink the milky, pinkish liquid. It was thick and tasted very sweet. The moment it touched Shar's stomach, the canine boi doubled over, feeling a wave of heat come over him. Kacey called out the canine's name but Shar didn't answer, not for a few tense seconds until Shar's eyes opened again and looked up. Kacey was standing over her fiancee, hesitantly calling out the labrador's name. Shar stood up and up until kacey had to crane her head up in a familiar way.
"Shar?" Kacey asked the tall, strong, curvy, well-endowed trans canine standing before her. "How do you feel?"
Shar smiled and licked Kacey's nose. "I am really, really horny. <3"
Kacey blushed and giggled, reaching down to untie the ribbon around Shar's sheath. "I can help with that. <3"
She certainly did. Kacey helped so greatly that most of the catatonic nursing staff was awoken to see the intense session in the center of the room, Kacey panting and heaving, breathlessly crying out over and over on her back as Shar gave her pussy a terrific pounding she hadn't had in too long. They changed positions twice, finally ending up in doggystyle (which most found quite appropriate) with kacey making the most lewd ahego expression Beverly had ever seen, held tight and finally knotted. Her stomach swelled in seconds as Shar came hard in her tailhole, careful to switch after slamming against her cunny for so long. The two lay there in each others arms afterward, reminiscent of their first night together with Shar tenderly hugging and licking Kacey's face.
"Miss me? <3" Shar asked softly after some time, nuzzling kacey's neck.
"I did, <3" came the soft reply before the hybrid blushed. "Though I'm kind of jealous of my mother and Auntie... they got to dress you up, after all."
"What is it about my boi self that makes everyone want to dress me?"
"It's just too tempting to make a cute boi into a little cute doll. <3"
The two giggled, Kacey's back against Shar's ample breasts as the canine's paws stroked her swollen tummy. All around them the nurses gradually came to their senses although none seemed to take notice of the engaged couple on the floor or the colt boi tied to the chair. Mischevious as they were, the OmniMed nurses proved their professionalism by quickly straightening their cuniforms and scurrying off to their duties. Kacey and Shar had only closed their eyes for a few seconds of cuddling only to find the common area nearly empty.
"Huh... they're sure quiet, aren't they?" Shar muttered.
Kacey sighed. "They think coming and going as silent as the wind makes it easier on others but to tell the truth, it's even more nerve-wracking. You never know when they'll pop out."
"Speaking of popping out..." Shar cleared her throat and began to stand, using her renewed strength to easily hold Kacey against herself. "We'd better get my 'sample' to Beverly while we're still knotted. Know where she is?"
"Probably in her office, oof, tending to herself after watching us," Kacey moaned, feeling her full tummy slosh with every step Shar took. "Hey, Shar?"
"Yes, love?"
"Um... if Beverly could somehow find a way to let you switch from this to boi form and back at will, would you do it? For me? <3"
There was a pause before Shar asked, "Like how your mother can switch gender?"
"Yes...?"
Shar chuckled and nuzzled Kacey's neck again, eliciting a giggle from the smaller hybrid. "Well... I wouldn't say 'no'. <3"

<3 <3 <3 To be continued... ? <3 <3 <3