Hard as a Diamond

She tugged at the last stitch, tying it shut, before standing back and marveling at her work. This dress was the center piece of a line commisions by a rich Canterlot noble, and one that she liked at that. She pulled the dress off the manikin, and folded it neatly, and placed it neatly on top of the other dresses, ready to be wrapped up and shipped out later in the week.

After the issue she had the other day, she'd felt completely drained for days. She didn't even need to wear a condom. She couldn't figure out what had caused her to become so productive all of a sudden, other than the possibility that Cadence had mistakenly cast a spell on her while mid orgasm. Thankfully, nopony had seen her, or if they did, they kept quiet about it. Thinking back on it, however, she had felt a huge thrill about the whole thing. Public sex and self pleasure is generally frowned upon, especially for a lady of her stature, and having gone through town like that, cumming all over the place in the middle of the day where anyone could see her, that had really awoken something in Rarity. She liked it, the thought of doing something she shouldn't and getting caught.

Her dick had started producing again, and quite alot too, more than she'd normally produce, but not as crazy as that day. She'd put on a condom to keep it in check while she worked, and it was quite full when she was done, dragging along the ground. She grabbed the rune, which came with the storage basement when the place was built, and powered it up, emptying several gallons of cum into the basement. She smiled and rubbed her rod, sending a jolt through her body. She wanted to jerk off, and make a big mess, but she had a spa appointment with Fluttershy today, and didn't want to miss it. She donned a sunhat, opting to go nude otherwise, and made her way out. As she took off towards the spa, other ponies where staring at her nude form. She was usually one to be clothed most of the time, but these past too weeks she found it more fun to be naked, and hadn't put on so much as a pair of panties or a shirt on since her time with Sweetie.

Her cock leaked into the condom steadily as it swung about, filling it up rather quickly already. Ponies that were out and about noticed it and started. They knew she was leaky, but not this much. Some ponies found themselves rather aroused as she passed by, the smell of her moistened pussy following her everywhere, and the large swinging cock and balls mesmerizing them. Ponies quickly vacated areas where she passed, likely to find somewhere to hide and release themselves. Finally, she made it to the spa, finding Fluttershy waiting for her in front.

"Oh! Hello Rarity!" Fluttershy smiled brightly at her, before looking down at Rarity's cock, and the condom that was already so full, it almost touched the ground, and blushing slightly. "I uh... see you're a little pent up right now."

"Oh not at all darling, I just seem to be growing into my family's famous... trait. Nothing to worry about, now come, lets get our spa date started." Fluttershy nodded and opened the door for her. Rarity took a moment to look Fluttershy over. She was a shorter mare, at about five foot ten, and had small, delicate features. She was thin, and had modestly sized breasts, smaller than Rarity's testicles for sure. Her cock was about a foot long, and her balls were about three inches across each. Though, Rarity knew that if she got worked up, her testicles could easily outgrow even her. Fluttershy was naked as well today, as she usually was when she went to the spa. She thanked Fluttershy. Aloe looked up from her magizine, and grinned brightly at Rarity.

"Oh Rarity! Fluttershy! So nice to see you. I assume you want your usual?" Aloe had on a sling bikini, same color as her mane, barely covering her bits. Her cock and balls too big to actually fit in it, hung out. her cock was a foot and a half long, and plum sized fruit hung under it. Her breasts were very small, only an A cup. Her sister looked almost exactly the same, but with an inverted color sceme

Fluttershy spoke up, "Um... just the baths today, please. I have something I need to do later... if that's alright with you."

"Of course missus Fluttershy! And missus Rarity, I noticed you seem to be rather messy today. I can take that rather full condom off your hands as payment for today. We are sorely laking it right now, and our usual providers haven't been up to the task lately."

"Of course darling, here let me..." She pulled her condom off, tied it, and passed it off to the spa twin. She got a smile in return, and made her way towards the bath rooms. Her cock left a trail behind her as she made her way through the spa building, not that the twins minded much. A large, warm room set into the ground several feet, just in case, with several steaming tubs filled. She found herself in front of the inlaid pool that she usually soaked in, only to find it empty.

"I'm sorry missus Rarity, but like I said, we've been out of cum lately, and so we've only got the water soaking bathes ready today," Aloe looked guiltly at her, though Rarity just shook her head.

"It's okay Aloe, I believe I can help you with that today. I seem to be developing like Granny Jade did lately, I may be able to fill it up for you," Aloe eyes widened with shock, and her mouth fell open.

"Madame Jade you say? Oh! Of course, yes please help yourself. I shall close off the room for now so you may have your privacy. Come missus Fluttershy, let us..."

"No no, it's quite alright darling, Fluttershy can stay if she wants. In fact, she might be able to help," Rarity stole a glance to the side, getting a nod from the shy pegasus. Aloe bowed her head, and then back out of the room, locking it.

Fluttershy made her way over, sitting on the edge of the pool, and spread her legs slightly. Fluttershy enough at ease around her friends that masturbating in front of them wasn't much of an issue, but she looked worriedly up at Rarity, who normally was very withdrawn about such things.

"Rarity? Are you sure that you're up to this? I can do it myself if you want..."

"Nonsense darling!" She cut off Fluttershy,, sitting down next to her, "Long gone are the days of prudish Miss Rarity! I've decieded life is too short to hide myself away. Now then how about we help each other with this, shall we?" A shy nod from her friend prompted her to grab Fluttershy's hard cock with one hand, and begin jerking it. Fluttershy slowly reached over to Rarity, hesitating some, before grabbing the large cock, and gently stroking it. It felt heavenly. Her hand was soft and gently, and tickled her maremeat sensually as it flitted up and down. Rarity found herself moaning at the soft touch, and her cock heartily spat out a glob of cum, before the stream of pre ramped up and covered her entire cock, and Fluttershy's hand in it. Rarity, in her growing lust, remembered the spell that had been cast on her the other day, and attempted to cast it from memory on her and Fluttershy. Rarity began to flush again, covering her shoulders, face, hips, and breasts. Fluttershy's face was lightly red tinged. Fluttershy was easy to get worked up, and her hips began to buck, her balls growing quickly, and precum gushing out of the tip of her flare.

Their combined arousal and musk spurred each other on, intensifying each others growth. Their balls quickly gained mass, reaching a foot across each, and began drooping low into the pool, covered completely in cum. Fluttershy was panting hard, her hips bucking wildly, and her hand now a blur on Rarity's penis. Cum now shot in an arc over a foot from her cock, still only pre. Rarity was also bucking, moaning as Fluttershy's soft hand massaged her. She wasn't quite shooting out cum yet, but was close. Cum began pooling in the rather large pool as they continued, bringing a strong musky smell to the whole room. Rarity finally spasmed, flaring up, and blasting cum out of her cock. She dumped several gallons of cum into the pool, filling it up a few inches, before she settled down. They'd let go of each other's cocks, and Fluttershy had both on hers, jerking it as hard as she could, her balls now two feet across, and cum blasting out the tip. But she wasn't reaching orgasm. Being such a shy gal, her anxiety sometimes got to her while masturbating, and could keep her from coming. But Rarity knew she just needed a little help.

She stood up and turned around, and positioning herself over Fluttershy, before croutching down over Fluttershy's crotch, facing the smaller pony. Fluttershy, sensing what she was doing, lifted her cock up and aimed it as best she could at Rarity's gaping vagina, splattering it with cum. Unfourunatly, when Rarity came down, she found Fluttershy aimed wrong, and suddenly had a cock completely buried in her ass. She hissed slightly at the unexpected intrusion, but quickly got over it, reveling in the sensations. She'd never taken it anal before, but it was an interesting and enjoyable sensation. Holding onto Fluttershy's shoulders, and her cock mashed between their breasts, mostly her own, Rarity began bouncing up and down on Fluttershy, earning quiet moans and lots of panting. Her still enlarged balls were squeazed between the two of them, making Fluttershy lean back. Rarity felt her stomach filling upwith semen quickly, and Fluttershy's flare grow. She'd only been counding on the cock for a minute, and Fluttershy was already about to blow, her balls at least four feet across each, and throbbing and bouncing violently. But before Rarity could pull herself off, Fluttershy came.

Rarity's belly ballooned outwards quickly, pushing fluttershy roughly to the floor. She felt it travel up her throat, and started gushing out of her mouth and nose. Panicing, she cast a self preservation spell on her and Fluttershy, one that helped fill their lungs with air when they were otherwise unable to get any. She'd never felt this before, but it was absolutely amazing. The puddle of cum began flowing into the pool, filling it. They were like that for half an hour, Rarity unable to breath as cum shot out, but also unwilling to get off. The pool was completly full of cum, and the room itself was beginning to fill. Rarity orgasmed again, her massive balls still growing and producing. Fluttershy's were growing as well, showing no sign of stopping.

The twins then entered the room, and gasped at the ammount of cum filling the room. Lotus hit a button on the other side of the door, and a wall opened up nearby, allowing the cum to flow out into a large storage room for fluids, like Rarity's basement, only many times larger. As time went on, their balls only grew larger and larger, causing more cum to shoot out. Rarity eventually had to pull herself off of Fluttershy, the flow becoming to much for her to handle. Cum rushed out of both holes quickly, and her stomach shrank. She flopped over onto the ground next to fluttershy, and grasped her dick, jerking it hard to make it cum harder. Aloe and Lotus watched with interest, and even some lust, as the girls emptied themselves, filling the storage room below. The twins jerked themselves off several times, a mere drop compared to what was there. Another half hour passed, before their testicles finally shrank back down, emptied of their loads. The storage room was filled completely, and the room began to flood again.

All four mares were panting hard from the exersion, Before the twins spoke up. They offered Rarity and Fluttershy compensasion for their massive contributions, including a lifetime of free spa visits. They didn't quite get their baths, since the cum needed to be mixed with minerals to really do anything special to their skin and coats, but they were very satisfied anyways. Fluttershy and Rarity showered off as the twins took to straightening things up. They made plans to visit the spa the next day to get a proper treatment. Fluttershy noticed she was leaking quite profusly, and asked Rarity for some condoms to keep the mess contained, before heading home.