"Hmmm," Todd hummed, opening his desk drawer and taking out standard issue blue pen. He set the long rod down next to Karen and watched her blush turn red hot.
"W-What are you gonna do with that?" She looked up, startled.
"Well, I'm not gonna write you a love letter, my little toy."
Karen put her hands to her mouth and stifled a huge laugh. "Todd, you... are you gonna fuck me with that pen, dude?"
He reached for the remote and smirked knowingly.
...orgasm makes Karen grow bigger, the stronger the orgasm the more she'll grow...
The tiny woman jumped and gasped. "S-Shit! What did you just do?"
Todd leaned over the desk and grinned seductively. "From now on, when you get off, you'll grow bigger."
Karen looked up in shock and her smile came back in full. "You sick fuck!" She laughed. "Making me earn back my size, huh?"
"Is that a problem? Seems like I can make you do whatever I want. I guess if you want to stay little you can..."
Todd emphasized this by picking up the pen, the phallic lid side sticking out, and thrusting it between Karen's shaking legs. She moaned her little high pitched moan, taking the pen shaft in her hands and leaning against the lid. She began to thrust her thighs, and as lubed up as she was, it began to slide back and forth between her sensitive pussy lips.
"Fuck, I've been too sore to cum for years. This is gonna feel great."
"I hope so," Todd whispered, watching in fascination as Karen ground herself against the lid of his pen. He could see the slick tracks from her pussy lube shining on the blue plastic. He watched her get hotter and hotter, nipples poking out as she began to seriously grind her pussy into the rigid cap. "If you make it a good one, you'll be big in no time. If it sucks, you won't grow much at all."
"I'll... I'll have to tease it out, then..." Karen said in between pants, carefully restraining herself and slowing her pace. "I wanna get big enough to fuck you, baby."
"Ooh," Todd blushed now. "I'd like that."
"S-So would I..." Karen blushed, beggining to sweat as she slowly edged herself on the slick pen lid. Todd held the pen in his fingers, holding it up so Karen could grind it, and after what seemed like forever the tiny woman thrust her hips in one more time and began to whimper. "H-Here I... I..."
She let out a high pitched squeak and began to gyrate as orgasm took her. Frantically squeezing her thighs against the lid of the pen, she grew. It must have been a good one, Todd noted, as Karen grew from three inches tall to just a little bit over six inches tall. Shuddering her last, she fell to her knees, still gripping the pen, and stared up licking her lips.
"Fuck." She stared panting, taking a sultry edge and leered up at Todd. "So far to go."
"Let me help," the giant grinned excitedly, helping Karen to lie down on the desk as he slipped the very pen tip into her still wet hole. He could just get the very thin point into her throbbing vagina, pressing it in gently.
"FUCK!" Karen screamed, falling limp on her back and gyrating as Todd began to gently pen fuck her. He wasn't trying to force it in, but she took more of the giant cap than he would have expected, so slick were her loins.
She grabbed the giant plastic lid and helped it stay inside of her, helping Todd to get the right rythym in and out as it pressed into her entrance.
"Shit, shit, SHIT!" Karen squeaked, tossing her head back violently and grimacing as she came a second time. A six inch woman became an eight inch woman. Todd stared in awe as Karen laid back panting desperately, still holding the pen cap in her shaking hands.
Todd looked down at her bigger hole, he glanced back to Karen, and she nodded eagerly, sweating and smiling. Todd pressed the pen in again for round two. To his shock, little Karen took a lot more of the lid in and began to fuck it eagerly, slipping her lips over the huge plastic shape and using it as the ultimate dildo. She grabbed the wood of the desk, thrust her hips forward, and her less high pitched moans deepened as she shot up a third time, gyrating, wiggling, squeeling, head thrashing from side to side.
Todd stared in utter shock as found himself staring at a doll sized little woman. Karen had grown to well over 12 inches tall and her latest spurt had left her even hotter. She was drenched in hot sweat and shivering with feminine delight.
"T-Think I can get one more out of me..." she managed. She grabbed the shaft of the pen from Todd and urged him to let go. He did, shocked, and let the little doll guide the tip back to her pussy, slipping more of it in and taking the tip like a giant cock. Good God, she got so much in. It didn't take long at all to fuck herself into more bliss, screaming out her joy as she stretched over 14" tall and tossed the pen onto the desk, exhausted and panting desperately.
"C-Can't.... that's it. That's it." Overly sensitive, the much bigger whore sat up, chest rising and falling desperately. She looked up at Todd's shocked expression and let out a maniacal giggle. "You... you liked that?"
"Uh-uh-huh." Todd managed, staring with wide eyes.
"Drop your pants," Karen blushed. "It's your turn to feel good, baby. I want to make you cum."