Sexy Brain Parasite Story

by Damaged


Quick-Play

Last period still had twenty-five minutes left, and Rarity was going to spend them well. She pulled up out the front of Spicy's shop, and made sure she had everything in her bag. The rings, the toy, and the batteries. "Perfect."

The tag wouldn't be done for a few days, probably after the weekend, but Rarity didn't want to move too fast, too quickly. She took one more look at the toy, and had a mental flash of Lavender Lace masturbating with her own vibrator.

Before leaving her car, Rarity read over her little pad, studying the notes she had researched. The things she was planning weren't dangerous, so long as she did everything just right, and paid careful attention to Sonata at every moment.

Rarity barely made it to the top of the stairs when a cerulean missile scored a direct hit. Thoughts of Lavender scattered, and Rarity turned her full focus to Sonata. "There you are. How have you been?" She ran one hand through Sonata Dusk's hair, feeling the silky-softness. She kept stroking the back of the former siren's head.

"I've been waiting for you." Sonata nuzzled against Rarity's hand, even tilted her head a little to get more attention on her ear.

"She's lying." Spicy Hot stepped into the doorway of his store, and couldn't hold back the smile at seeing Sonata and Rarity so happy together. "She forgot all about you. Never mentioned you once, Rarity."

"You really feel like that?" Looking down into Sonata's eyes, Rarity could believe it. "Are you sure this—"

"Rarity, remember, she is new to being human." Spicy peeked around the corner and down the stairs. "Didn't you and Rainbow Dash go shopping?"

"She said she needs to practice more for this weekend. I'm supposed to be going there, soon." Rarity tried to guide Sonata into Spicy's apartment. "Which is why I made a point of coming to declare Sonata out-of-bounds." She felt Sonata practically bounce against her.

Spicy just rolled his eyes. "She's all yours, oh mistress of magic." He turned and slunk back into the shop, leaving Rarity and Sonata alone.

"Mine." Rarity said the word low, but firm, right in Sonata's ear. She had to chase her pet into the apartment, and kept up the chase all the way to Sonata's bed.

The mattress was big enough for two people, with a simple enough set of sheets, blankets, and a cover topping it off. Sonata flopped herself down on the bed and turned to look at Rarity. Her heart was beating faster than it had for a hundred years, she ached for every second she got to spend with Rarity.

"Now, let's see what I have for my pet." Rarity reached into her bag, and then paused. "But you're overdressed." Pitching her eyelashes low, Rarity looked at Sonata from under them. She knew her message was received when Sonata began to unfasten her jacket. "Slowly."

"You haven't been with other girls before, have you, Mistress?" Sonata stood up, aware of Rarity's eyes tracing her body constantly. It had been too long since she had been adored for anything but her mind-control.

"I had—Rainbow Dash and I had a little experiment or two, but it didn't go anywhere. And I spend time with some friends, once a week, having a therapeutic mud bath and tan session." With no idea why she had mentioned it, Rarity felt the need to continue. "And—and I helped a friend home from school today, who seemed to be debilitatingly horny. I…" She trailed off as Sonata lifted her shirt up and over her head.

"Are you hungry, Mistress?" Purring like a cat, Sonata turned slowly until her back was to Rarity, and reached back to unhook her bra.

Rarity nodded. "I-I'm famished. But I think I've found something to eat." She reached forward, grasping the two straps as they let go.

As Rarity's hands stroked around her sides, Sonata lifted her arms and let her mistress do as she wished—that was the proper order of things, after all. "Did you help your friend?"

Her hands traced around Sonata's sides until both palms had a handful each of soft, warm breast. She couldn't not massage Sonata's chest. "I had to speak sternly to her. I ordered her to her bedroom, undressed her, and left her on her bed with a vibrator."

Pushing her chest into Rarity's grip a little more, Sonata leaned her head to the side and looked back over her shoulder. "You don't want any others but me, Mistress?"

Rarity pulled Sonata back against her, and while she kept rubbing, she nibbled at Sonata's neck. From one nibble to the next, she asked, "D-Do you like having other girls with—with you? Like this, I mean." Rarity slowly unfastened Sonata's collar.

Preparing to answer, Sonata opened her mouth to reply, when she felt Rarity's grip tighten. Her eyes widened as perfect lips clamped down over the big vein in her neck, and sucked hard. Sonata moaned and almost went limp.

Sonata's world was solid, real. The tight grip of Rarity's arms, and the tighter grip of her mouth, had Sonata's motor running. Firmness, control, and she knew that what Rarity was doing would absolutely leave a mark—if just for a week or two.

Keeping her lungs working, Rarity maintained her hold with one hand, while the other explored Sonata's body. She stroked Sonata's breasts, squeezing and rubbing, then trailed her hand down her lover's belly.

"W-Wait, please." Every ounce of Sonata's self-control was in evidence. She struggled to get the words out, and then part of her hated having said them. Rarity's lips left her neck, and the tight grip was suddenly loose.

"What's wrong?" Rarity waited a moment for Sonata to gather her wits. "Did I hurt you?"

"I'm overdressed." Sonata turned a little, slipping from Rarity's hands, and moved onto the bed on all fours. Looking away from Rarity, she casually reached back with a hand and pulled her skirt and underwear down with one smooth movement.

Rarity's heart pounded as she watched Sonata reveal herself completely. For her, there was something profoundly arousing about her pet's desire to completely reveal herself like this. She watched as Sonata toppled herself sideways, and rolled to her back.

"Now I am ready for you, Mistress. Please come and do what you wish with me." Sonata shifted her hips, which made her whole body move. She gazed up at Rarity and spread her legs ever so slightly in invitation.

"L-Limits?" Rarity barely got the question out.

"None, Mistress." Closing her eyes to enhance her own excitement, Sonata heard something start buzzing. She fought her inner self not to open her eyes, but rather than the toy pressing directly to her, she felt the vibrator touch her palm. "Mistress?"

Rarity reached to her bag again and pulled out a piercing needle and the swabs for it. "Use this while I work."

Sonata took a firm grip on the toy, and rather than putting it directly between her legs, she brought it up and rubbed it between her breasts. Laying back as she was, there wasn't a deep cleft to work the toy into, but it still fell great to have the wiggling, vibrating thing touch her sensitive flesh.

Leaning over Sonata's head, Rarity pulled on the gloves she had gotten for the job at hand. "I'm going to pierce your ears. Just nod if you are alright with this." She waited, and was perfectly okay with her pet taking her time. When the nod came, Rarity smiled. "Put that toy somewhere more interesting. It will distract you from this."

Obedient, Sonata Dusk traced her chest, belly, and past her mons. When the buzzing toy found her lower lips, she let out a moan. Rarity took a firm hold on her ear, and just as she pressed the toy more firmly against her body, the needle pushed through her ear.

It wasn't the first time Sonata had had her ears pierced, but the way Rarity did it was now, officially, Sonata's favorite. The slight sting was washed under in the wave of buzzing bliss that radiated from anywhere the toy touched. She traced the wriggling tip up and down her entrance, and when she felt a firm grip on her ear again, she pressed the toy's tip inside her vulva.

With two rings fitted to Sonata's left ear, Rarity firmly moved Sonata's head. Rarity was wearing a short skirt, and she still had Rainbow Dash's panties on, which was part of the reason she made sure Sonata was looking between her mistress' thighs while Rarity worked.

The third sting came without warning, but Sonata was so worked up her brain misinterpreted pain for pleasure. She moaned, and pressed the toy deeper in response to the rush of feeling. She didn't even notice the fourth ring being pressed in, but when Rarity shifted, Sonata lost the sight of the tight, blue panties her mistress wore.

Rarity repositioned, laying down so that her head was at Sonata's neck. She opened her mouth and started working on the location of the first hickey, but slightly further along.

Tight suction, gifted by her mistress' mouth, came again and again to Sonata's neck. She worked the toy into herself deeper, letting the thing move as it would. Rarity worked across Sonata's throat, drawing a line that would soon grow dark with blood.

When Rarity lowered herself down to Sonata's cleavage, she was still in her element. Her pet was enjoying this—as evidenced by the soft, happy sounds she kept making. "Work yourself all the way. I'm going to bite you."

Sonata's pulse quickened; just hearing her mistress' plan worked her closer to her end. She began to work the toy in and out, her mind racing as to where she was going to be bitten. Then, as if by accident, the toy's clitoral massager connected with its intended target for the first time.

When Sonata arched her back, Rarity struck. She bit at the side of Sonata's breast; not hard enough to break the skin, but it was more than enough to leave a mark. With Sonata struggling in the peak of her private slice of heaven, Rarity closed her lips around the mark and sucked hard.

Pain and pleasure blended, and Sonata knew a level of bliss that she hadn't reached for a very long time. She mewled like a kitten, she trembled, but ultimately held as still as her orgasm would let her—her mistress was working, after all.

As Sonata stopped moving, Rarity slowly let go and drew her head back to inspect her work. A perfect double-arc was imprinted on Sonata's cerulean flesh, and the surrounding area was already starting to show signs of a bright hickey. "Mine." Her upper arms seemed to ache a little in sympathy with her pet.

"M-M-Mistress…" Sonata took a moment, the word trailing off, to work out what she needed to say. She stared up at the ceiling of her bedroom (which was the underside of the loft flooring that Spicy's bed was on). Her mind caught back up with her, and she turned her head to look into Rarity's eyes. "Your practice."

Rarity had completely forgotten about band practice, but looking into Sonata's eyes, she wanted desperately to kiss her. So she did. Rolling to her back, Rarity pulled Sonata up and onto her. She felt the weight settle comfortably on her chest, and kept rolling her lips over Sonata's.

One of Sonata's arms braced against the bed, but the other found the hemline of Rarity's shirt, and slid up and under it. Rarity's breasts were larger than Sonata's by a good margin, but Sonata had not a jot of jealousy. She massaged the first of her mistress' boobs her hand found, and felt Rarity become more insistent with the kiss.

Rarity's tongue suddenly shoved between the union of their lips, and Sonata welcomed it with a gentle suck, and a lick from her own fleshy muscle.

Both girls lost track of time, until the moment when Rarity's phone rang. The kiss ended, and Sonata reached into Rarity's bag to grab the offending electronic device. Tapping answer, her eyes danced over Rarity's face. She saw it was Rainbow Dash calling. "Mistress Rarity's phone. Her chief harem-girl regrets to inform that the goddess Rarity is unable to take the call, she is being pleasured by—"

Managing to grab her phone from Sonata, Rarity was too busy laughing to talk at first.

Rainbow Dash's voice came through the tiny speaker against Rarity's ear. "Sonata? What's going—Wait! I don't want to know. Can you tell—"

"I'm here, Rainbow. Sorry, we got a little carried away." Rarity was fending off nibbles and playful bites from Sonata while taking the call. "I'll be there as soon as I can."

"See you soon!" Rainbow Dash said, moments before Rarity ended the call.

"Can I come too, Mistress?" Sonata folded her knees under her, and looked at Rarity with big, puppy eyes.

"You're naked, pet. You would need to get dressed." Rarity jumped up from the bed, quickly straightening her clothes. Pulling out her makeup compact, she quickly checked her face. Suspicion got the better of her, however, and she snapped the compact closed.

Sitting on the bed, Sonata had just finishing fastening her collar on again—but otherwise still nude. "There. I'm all dressed!"

Rarity groaned at the sight. "You would happily go out like that if I told you to, wouldn't you?" Sonata just nodded to her. "Get dressed fully, Sonata."

The two finished getting dressed together, and quickly made their way out to Rarity's car.

When Lavender had been in the car (earlier in the day), Rarity had been a little freaked out by the stray hand that had found her lap, but now she shifted to widen her thighs a little. The difference in the hand's owner was everything.

Within Rarity's head, her parasite was busy binding to all the surrounding tissue properly, but it had quickly recognized the link between Rarity and Sonata. To the parasite's complete shock, there had even been enough pleasure for it to feed without the host being driven out of control by lust. The parasite, simple as its mind was, resolved to let its host feed it freely for now, and would only push them if they were lax in their duties.

Sonata's digits slid under Rarity's skirt, and danced over her panty-clad vulva; she had to bite back a shudder. "A little higher, darling." Rarity felt Sonata's fingers dutifully search upward to her mons. "There. I need to drive, and while it would be fun to let you keep playing, I also have to concentrate."

Even with Sonata keeping her hand higher than Rarity's more sensitive areas, she still felt intensely turned on. The drive, however, wasn't far, and they were pulling up in the school parking lot in short order.