Flutterbat.

It was several months later, and as of yet nobody suspected anything. The spa was running better then ever now that the natural charm of three vampires was being put to use in running it. They were drawing in three times the money that they had been before, which was amazing considering it had only been a matter of weeks.

Rarity was currently running the counter and sending customers through and generally doing all the light work. This was because she had not yet closed down her dress shop, so technically she was doing two jobs at once.

However, even her comparatively light job became a rush at peak times. The spa mares were currently tending to the needs of whatever ponies came in, as they were the best trained and most experienced in giving massages and other tasks.

Their business had been going so well that they had been forced to expand the spa. Fluttershy had managed to sneak a few things in amongst the upgrades, nothing too major. The main thing had been having a massive dungeon built beneath the whole spa, which was where she was currently heading now.

Her hooves clattered softly down the stone steps, the only light being that of a few dozen torches set into the walls either side of the staircase. She did not know exactly why it was she had felt the need to install a dungeon beneath the spa, but she felt that it was a very important part of being a vampire to have somewhere dark and spooky to sit.

Of course, the builders had been very curious as to why it was they needed a dungeon. Like all ponies however, they had been more then happy to keep working upon seeing how much they were going to be paid. Of course, Fluttershy had paid them nothing, knowing that they would have likely reported it to the royal guard anyway.

So she had given them another reward altogether. The soft hum of machines met her ears as she moved down to the main floor of the dungeon, which had rows upon rows of pens lain out in a very efficent approximation of the battery farming done with chickens.

Each of the pens was composed of a small closed off pen made up of metal fences, with a bale of hay and a troth of water in each of them, along with a machine set up just above them. Each of the pens contained a pony within them, mostly workers or creatures who had visited and asked far too many questions.

And now they had quite the collection of them, each of the ponies staring blankly ahead, their minds blank and empty. It had taken quite a lot of effort to break each of them individually, but in the end it had been more then worth it.

The machines that were set above them had been modified for a single purpose, thanks to an engineer that Fluttershy had managed to seduce. Now each of them had a clear, thin tube pressed into the back of their neck and locked in place with a magical clamp.

Getting all these medical supplies had been by far the hardest part, but now she had all the blood she could want, ready for her at the touch of a button. She kept moving down the middle of the dungeon, feeling pride blooming in her chest as she basked in their blank stares and soft grumbles.
She was feeling more confident in her abilities with every passing day, and the sight of dozens of ponies all staring at her like she was some kind of holy object was only making her confidence climb all the faster.

The flickering torch light managed to provide enough light for her to easily see by, and she had no trouble at all finding the large wooden tub that she had set out at the end of the dungeon, next to a troth.

Normally she would just use the troth, but she was sure that the two spa twins and Rarity would be able to handle any customers for today. She stood just outside the simple wooden tub, looking down at a small control panel that she had managed to set up by some miracle, the cables for which snaked their way along the floor in an obvious violation of health and safety.

After making sure that everything was set up correctly, she hit a button and moved down into the tub, lying at the bottom of it as she stared up at the celing where a large output pipe was set, her legs spread and her cunt already drenched in excitement for what she knew was going to happen next.

The several dozen machines begin to hum to life above the heads of their captors, starting with those nearest the control panel and moving backwards through the dungeon. It started as a low buzzing akin to that of a set of strip lights, then slowly begin to pick up.

By the time all the machines had managed to power up, it was a hellish cacophony of almost deafening buzzing. Then, one by one, the machines begin to extract their toll.

Crimson fluid moved up out of each of the penned ponies, each of which seemed to find the process extremely pleasurable. Fluttershy had realized that caring for each of them individually would have been impossible, and so she had trained them all to care for themselves.

If they so wished, they could easily unplug themselves from the machines, climb out of the pen and go tell the authorities about what Fluttershy had done. And yet each of them chose not to do that, because here they were safe, they had food and water and they did not need to worry about anything but growing as much blood as possible for their Mistress.

This was far more arousing to Fluttershy then locking them up with force could have ever been. The blood traveled up through the clear rubbing tube, before finally reaching the black box set into the roof, which seemed to stop buzzing upon being fed the crimson fluid, as if it was somehow sated by their sacrifice.

The hellish sound of buzzing slowed down to a soft, sated hum as each of the machines drew their due from the ponies beneath them. After taking enough of the blood, it was sent out of the machine and along another clear tube, dozens of them joining together into one massive mass in the middle of the dungeon, right above the path that Fluttershy had traveled along.

Fluttershy almost came right then and there. This was why she had chosen to use clear tubing, the sight of dozens of tubes all joining together, moving the blood towards her like some great mechanical heart. It was… Perfect.

The dozens of vein like tubes carried the blood towards a much larger black box set above the tub, which had output pipes for both the troth and the bath tub. Upon reaching the large black container, its own buzzing died down to a hum.

If Fluttershy still drew breath, it likely would have caught in her throat right then and there, spread out like some needy whore beneath the output pipe, her legs and move open wide to accept the fluid that she had worked so hard to harvest.

And then a thick stream of blood cascaded out of the black plastic pipe, akin to a grotesque water-fall as it rushed towards her. She welcomed it, and it washed over her.

The blood was still warm as it painted her yellow fur red, pouring into her mouth where she greedily swallowed it down, washing over every inch of her body and filling her with almost other worldly pleasure. Her cunt got a healthy coating of it and she cried out in bliss.

Now she remembered why she had installed sound-proofing. She let the fluid wash over her as her hoof desperately begin to rub over her cunt, sending intense joy tearing through her body as her snatch begin to wink needfully, crying out for a cock she would never provide it with.

She might have enjoyed the blood a lot and been a little bit whorish, but there was no way she was stooping to the level of letting a random stallion fuck her. Fluttershy still had some self respect.

She could still fantasize about such things however, and she did so with gusto, spreading her legs wide as the crimson fluid painted coated her. Her wings spread out either side of her, allowing the blood to cascade over them as her eyes rolled back in her head.

Her eyes closed tightly, preventing the blood from getting into them as her hoof frantically teased over her cunt, picturing some massive, brutish stallion fucking her, wrapping his hoof around her and pulling her back and forth on his cock like some kind of living flesh light.

The blood kept coming, washing over her as it begin to slowly fill up the wooden tub, which Fluttershy rolled about in happily, her wings now drenched in blood which they eagerly splashed all over the sides of the tub.

Her eyes rolled back in her head as her hips bucked madly onto her hoof. The warmth of the blood seemed to fill her, sending her into a frenzy of lust and need.

She swallowed down all the blood she could, the coppery tasting fluid sending her into a frenzy. The pleasure tearing through her body seemed to be amplified by the blood, and her orgasm made a sudden attempt to sneak up on her.

Fluttershy allowed the orgasm to tear through her, a loud squeal tearing from her lips as her hips bucked buck and forth on the invisible cock that she was currently imagining ploughing back and forth in and out of her tight snatch.

She could have gotten out of the bath, gone over and had any of those stallions he wanted plough her brains out and then ram their load into her womb. But she would never do that, because they were so beneath her that she would never give them any pleasure or let them defile her perfect body.

Her hoof kept rubbing as she thrashed about in the blood, splashing it about as she rubbed frantically over her clit, already well on the way to her second climax. The blood all around her kept the mare in an almost constant frenzy, and she lost count of just how many orgasms she had, rolling around and drenching herself in blood.

As she lay back in that tub, every inch of her body aching softly as he mind buzzed and attempted to recover from the almost endless intense orgasms that had ripped through it.

Her plan had gone perfectly, and now the only thing that she needed to do was reap the reward of all her hard work.