Jennifers Workout

Jen walked into the house and found her mother busy with some papers on the kitchen table. She

looked up and said, "Hi honey, how was your day?"

"Good, mom, I'm going to take a shower and get ready for my workout."

Her mother looked up at her and said, "Ok dear, make sure you eat well tonight, I made your favorite chicken casserole. Oh, and don't forget to feed your pet."

Jen smiled and replied, "Yes mom, I will make sure he gets fed before I leave for my date later."

Jen went upstairs to her room and took off her clothes and got in the shower. She washed herself thoroughly then lathered up her hair and let it sit in the hot water for a few minutes. When she was done she dried herself off and went into her bedroom.

She opened her closet door and took out her workout cloths. She put them on and walked over to her mirror. She checked herself out and thought she looked good. She turned around and bent over and checked her ass in the mirror. She was happy to see it had toned considerably since she started her workout routine. She was pleased with her appearance and took a deep breath and left her room.

When she came downstairs, her mother asked her if she'd infected her brother yet.

"No mom, I haven't gotten to him yet," she said.

"Well, hurry up, we're having company for dinner tonight and I want you both to be nice and fresh, not smelling like sweat and sex."

Jen's heart sank a little bit. She loved the idea of fucking her brother, ending the incestuous coupling with his parasitic infection, but she also wanted to go spend some time with her pet snake. Loyalty to her masters won out of course.

"Ok mom, I'll try to do better."

"Good, now get your ass out to the garage so your brother can get a good whiff of you."

Jen's heart skipped a beat and she felt a rush of excitement as she headed towards the garage, her already wet pussy juicing harder as her body ramped up its attractiveness in anticipation of seducing and infecting a new host. The teen's attractive face became flush and her tits swelled. Her sweet little pink nipples grew hard and sensitive as the parasites within threw her body into supercharged sexual arousal. She stepped into the garage, spotting her brother Mike lifting weights and swept close, ready to begin the seduction.

Mike glanced up at Jen and smiled, seeing her athletic figure standing next to him. He could tell

by the way she was looking at him that she was excited about something. "So, what's up?"

"Oh, nothing, I just wanted to work out with you today. I haven't seen you in a while and I miss hanging out with you." she smiled in the way that melted his heart, "Can I spot?" she asked. He nodded in acceptance and started lifting.

"I have to say, I'm really glad you've been working out too, you look great!" he said.

Jen smiled and said, "Thanks, I feel good too. You know, I've always been athletic, but this is different. I mean, I'm stronger than ever and I'm faster, too."

"Yeah, I noticed," Mike said. "You're looking good too."

"Really?" she said, surprised. "You flatter me. What's so great about my body?"

"Well, I think you look amazing, especially your ass," he said, looking her over.

Jen blushed a little bit and turned away from him, trying to hide her embarrassment while inside her slave self smiled, even if he didn't realize it yet but her pheromones were taking affect, already his body was responding to her as a female.

"Hey, don't worry, I'm not saying you need to change anything," he said, watching his little sister stretch in preparation for her own workout. His eyes couldn't help noticing her pert little breasts in the red sports bra, her narrow little waist and heart shaped ass. The well muscles but still supple looking legs. A shocking wave of intense sexual desire suddenly struck him She was his beloved little sister but she was also... Perfect.

Jen turned back around and smiled at him. "Really? Thank you."

"No problem, I just meant that you look great," he said, his cheeks burning with embarrassment at being caught looking, he angled his hips, attempting to hide his growing erection.

Jen giggled, "I don't mind you looking, in fact." she said, winking at him before, to Mike's utter astonishment stripping off her sports bra and terrycloth shorts, leaving her perfect little body bare to his riveted eyes. Predatorily she stepped close, standing on her tippy toes and wrapping her arms around his neck. Mike shuddered, frozen as her hot body pressed against his and suddenly her lips met his own, and her tongue was stabbing playfully into his mouth as she passionately kissed him. He knew he should be horrified and repulsed but instead he found himself desperately kissing her back.

She pulled back and whispered, "I want you." Jen's little hand slipped up his shorts leg and suddenly soft warm hands wrapped around his hardness, making his entire body jump and shudder. "Oh! So eager. I want you soooo bad."

"Me too," he said, feeling his cock stiffen more in response to her touch.

"You know, you're really handsome," she said, smiling as she pulled his shorts down, laughing as his inflamed cock bounced free. "I've wanted to do this for so long." He lay back on the bench as Jen straddled him, leaving the purple head of his cock straining desperately as she waited for a moment, her pink nether lips glistening as she crouched poised, teasing him as he strained upwards for penetration.

Finally, she leaned forward and took him inside her, slowly sinking down until his swollen cock was buried in her silky pussy. Mike groaned in pleasure, feeling her warm tightness envelop him. He reached up and grabbed her butt, pulling her closer as she began riding him, moaning in delight as his throbbing shaft slid in and out of her slippery hole. Mike's mind was spinning with excitement as his sister rode him, her small firm breasts bouncing and jiggling enticingly. He felt his balls tighten and his cock swell inside her, pushing deep inside her wet cunt as his orgasm approached.

"Oh fuck! I'm gonna cum!" he gasped, struggling to keep from blowing his load right then and there.

"Give it to me! Cum in my unprotected pussy and knock me up, bro!" Jen begged, digging her nails into his chest as she rode her struggling victim harder.

Mike could only grunt in reply, unable to speak through the pleasure wracking his body as his sister rode him like a wild woman, slamming her hot little body against his as she rode him hard and fast, her little pussy squeezing his rigid cock with an incredible tightness as she came. He groaned helplessly as he lost control, flooding his little sister's uterus with semen while she looked down at him with an evil smile.

"Yes! Yes! Give it to me! Fuck me! Fill my womb with your seed!" she cried, her voice rising in pitch and volume as she orgasmed on top of her brother, his cock pumping spurt after spurt of his potent sperm deep inside her.

When she finally collapsed, seemingly exhausted, Mike let go of her, panting heavily.

"Wow," he said, looking down at his sister, who was lying on his chest, his cock still buried inside her. His initial lust now sated,feelings of shame and what they had done began to take over and he tried to lift her off of him. Instead he found himself pinned beneath her, his hands held above his head by unnatural strength.

"We're stronger than you." She giggled at his quizzical expression, " I mean us hosts are stronger than you regular humans. Don't worry, soon you will know and share this strength once you have your own Master. Its time for a kiss!"

"What?" Mike asked before watching stunned and horrified as her throat stretched grotesquely as something made its way up with a sickening wet stretching sound. Jen's eyes glinted wickedly as she opened her mouth to reveal a black wet *thing* covered in chitinous plates emerging. She depositing the monstrous creature on his chest, its many legs writhing as it sensed the presence of host nearby.

"Yuck! Gross!" Mike exclaimed, staring at the thing as it sat on his chest, his heart pounding in fear.

"It's not gross, its beautiful," Jen replied. "And you belong to it now."

Mike stared at his sister, his face turning red with embarrassment as she grinned and added, "Now kiss it!"

"No!" he protested, trying to pull away from her, "Get it off me!"

Jen laughed, beginning to ride him slowly again, her pheromones keeping him hard despite his terror, "You don't get to decide anymore. Now kiss it or else."

Mike froze, staring at her, his mind reeling. Suddenly he could feel the thing's mind inside his head, urging him to kiss it. It was as if it was controlling him, forcing him to obey. He felt his mouth part, his tongue touching hers as he kissed the slimy thing that was on his chest. The sensation was alien and repulsive but somehow familiar. He knew instinctively what to do as he opened wide and let it clamber inside.

"Good boy," Jen cooed, stroking his hair as she continued to ride her brother, feeling the first tremors of convulsion begin as her child merged with him, "Now it's time for you to be ours."

***