Drying herself off, Jackie began to dress, unaware of the worm that was sitting inside her underwear, waiting to strike. Pulling up her panties, the worm was now pressed right up against Jackie's pussy, giving it the perfect opening. Hearing the girl's movements, the worm stopped and listed. Jackie had pulled up her shorts and put on her bra, continuing to hum to herself. She started to do her hair, her mind wandering. She was drop dead gorgeous, she wasn't shy to admit that. Looking down at her C-cup breasts, she sighed in frustration. One more than one occasion, she had caught some of the guys at school glancing down at her chest, the thought of which made her cringe in disgust. Although, Jackie thought, giggling to herself, she wouldn't really mind if Marco took a peek.
Jackie's thoughts drifted to her boyfriend in amusement, her mind going back to that day. Marco had come over for a study session, the two of them alone as Jackie's parents had left for the afternoon. She had "accidentally" dropped her pencil and made a show of bending over to pick it up, the outline of her ass quite visible through her shorts. Jackie had laughed for almost a solid minute after seeing the expression on her boyfriend's face, assuring him that she didn't mind, and all he had to do was ask if he wanted to get a quick peek.
Jackie was blushing bright red now, giggling. Especially since she had just felt a burning pleasure in her crotch, assuming that she had gotten a tad bit excited. Inside Jackie's panties, the worm had spread open her pussy with its tendrils, taking note of the warm wet interior. Not feeling any more sudden movements, the creature swiftly pushed itself inside Jackie's pussy, her slick walls clamping down against the slimy invader.
Jackie immediately stopped giggling and her embarassed arousal was now replaced by fear and shock. A cold chill suddenly ran up her spine. What the hell had just went inside her?
"Wh-what?" Jackie said, her voice quivering. She had no idea what to do. She had felt a slithering sensation moving up inside her, into her womb, before it suddenly stopped. Was it a parasite? She felt sick to her stomach, the day's plans now completely thrown out the window. She felt dirty despite her recent shower, and her skin was slicked with sweat.
Inside Jackie's body, the creature had pulled itself into her head and stopped. Her brain was big and pulsating, the bright pink organ inviting it in. Climbing onto the brain, the worm again stopped, waiting for any sudden movements. Feeling none, the worm shot a tendril into Jackie's brain, feeling it bury itself into the deepest part of the girl's subconcious.
"Hospital. I need a hospital" Jackie said weakly. She attempted to pull herself up, but was surprised to find that her arms refused to move. In fact, no matter how hard she tried, she couldn't move them at all.
"H-huh?" Jackie said, now more scared than ever. "Wh-what just happen-. Oh. Oh NO." She said, her eyes suddenly widening in horrified realization. The worm shot another tendril into Jackie's brain, the tingling sensation in her head confirming the girl's fears.
"Pl-please," Jackie pleaded, whimpering. "Y-you're in my head. In my brain. Controlling me. Please, let me go". In response, Jackie felt another tingle, as another tendril had burrowed into her brain. Jackie let out a moan at this, the tendril having burrowed into the part of her brain directly connected to her pussy.
Jackie's thoughts once again drifted to her boyfriend. Then Alfonzo. Then Ferguson. In fact, every guy in class was now in her thoughts. Jackie let out a moan of pleasure, her hand drifting into her shorts. Each and every one of them was fucking her, using her, giving her to the next one as they gangbanged her. Jackie had just plunged her fingers into her pussy when she gasped and pulled them out in shock.
"No! No! Stop putting such disgusting thoughts in my head, you pervert!" She shouted. Now Oskar was having a turn, spreading her legs wide open and beginning to go down on her, causing Jackie to give another squeak of excited pleasure.
"Get out of me! Get out of my head!" Jackie screamed, her thoughts now filled with pure rage and hatred towards the creature that was violating her like this. "LEAVE MY BRAIN ALONE!"
Jackie's hand suddenly slapped her. Shocked and in pain, she looked down at it. Oh shit, she couldn't move her arms now. Jackie let out another whimper of fear as her hand once again plunged into her pussy, this time without any input on her end.
"Pl-please." Jackie said once again, her voice now a quiet whisper. Glancing into the mirror, she saw she had been crying. Fresh tears were running down her face, hitting the tiled floor below. Marco was fucking her now, his thrusts giving her a warm comforting feeling. It felt... good. Like she was at home. She wanted this. Jackie was smiling now, feeling her hand fucking herself, thrusting in beat with her boyfriend. She couldn't believe she hadn't wanted this. It felt soooo good. The last of the worm's tendrils had wrapped itself around Jackie's brainstem, sending her over the edge. Jackie screamed in pleasure, her shriek loud enough to wake up the entire neighborhood, as she fell backwards onto the bathroom floor. The last thing Jackie felt before everything went blank was a tidal wave of cum running down her legs, the warm liquid giving her comfort, letting her know that eveything would be ok.
Jackie's body had went limp, her eyes closed. For several seconds, nothing happened. Then, her hands slowly grabbed the edge of the sink, pulling herself up. Looking at her reflection, Jackie smirked, her glowing green eyes staring directly back at her. She had full control of this body now. And it was a good one. Ripping off her bra, Jackie laughed evilly as she began playing with her breasts, feeling them between her fingers. Oh, this was definitely a good one, she thought to herself. Jackie's thoughts once again drifted back to her classmates, her boyfriend. She felt a warm tingling sensation in her crotch at the thought of them.
She would make a good little breeder. This girl's body would be perfect for reproducing the worm's species, giving it plenty more bodies to possess. Reaching into the pocket of her shorts, Jackie pulled out her phone, chuckling. Taking a picture of her nude body, she began texting Marco, asking him if he'd like to come over for some "extra credit" on their study session. Then she hit "send", a shrill cold laugh coming out of her mouth as she saw the three dots appear in response.