I asked my girlfriend Katey to stay over at my house for the night. She asked her parents and they'd approved since it was a Friday and my parents would be here to chaperone. We had a great night and stayed up late to have fun. When we went to sleep, we were both exhausted. The next morning, Katey decided to wake me up with a blow job. She'd stroked me to hardness, then filled her mouth with my cock. Of course, since I'd gotten Master PC, it was a bit longer and thicker than before. Okay, maybe a lot longer and thicker. I'd expanded it to nearly 12" in length, and the diameter of a can of coke, getting fatter toward the base. I'd made the head somewhat larger than the shaft. Humongous. What a great word. How often do you really get to use a word like that?
Sorry. My balls weren't much larger than they had been before, but I'd given myself the ability to control the amount of cum, and control of my orgasms as well.
I should say that Katey is a small girl. Barely five feet tall, and exceedingly slender. No breasts to speak of. Alabaster skin and black hair, down to the middle of her back. I'd had to use Master PC to change her body to be able to accept my new cock. I'd let her stretch more, increased the depth of her vagina, increased the amount of lubrication she produced. Even then I didn't fit perfectly, and she remained really tight.
I hadn't changed her mind in any way, though. Well, almost no changes. I'd made it so that she didn't wonder why my cock was suddenly twice its previous size.
She had been my girlfriend before I'd gotten Master PC, and she remained my girlfriend after. I hadn't had any desire to gather a harem or any of that. Growing up next door to one another, we'd always had a closeness that we hadn't shared with anyone else, even our other friends. When I'd hit puberty, I realized that what we shared was love. We started dating a few months later. No one was surprised, including our families. They could all see the unbreakable bond we shared. We had sex the first time the day after my fourteenth birthday. That, we kept secret from our families, because we knew they wouldn't approve at our ages.
So, like I was saying, Katey was slavering over my cock head, it being the only part she could fit in her mouth at this point. She let saliva drip all over my shaft, and used her small hands to stroke up and down. Proficient. That described her ability to give me pleasure. We were attuned to one another, had been since we were small children. That carried over into our current physical relationship.
I only came fully awake when she moved up, straddling my midsection. She leaned forward, kissing me on the lips. She could be so gentle. Silently, I watched her as she reached between our bodies, grasped my shaft in her hand, and tilted it upward to make contact with her labia.
"Mmm," she breathed loudly, moaning with approval at the sensation. Pushing her hips back, my head applied pressure to her labia, forcing them inward. She rotated her hips slowly, causing her lips to slide back and forth against one another, and simultaneously drew more moisture from within her to continue coating my head with her liquid. Adding more pressure, her lips suddenly spread apart, allowing the head of my cock to contact the outer edges of her vagina.
"Mmm," she repeated, her closed eyes slowly opening, staring into mine as she increased the force of her downward pressure. I could feel the outer edge of her pussy stretch, stretch more, and then stretch even more, trying to accommodate my massive head. Suddenly, I felt her pussy spread open, and my head entered her canal.
This time I groaned, and she closed her eyes again, focused completely on the feeling of my shaft beginning to fill her up. God, she was tight. She slid down a couple inches, then reversed course, and pulled up so only the head remained inside her. She pushed down again, slowly taking more of my shaft. Three, four, then five inches. Pausing again, she lifted up once more, again, leaving only my head inside. Opening her eyes, she looked at me smoulderingly, forcing herself back down onto my cock once more. This time she pushed down onto my cock until I hit bottom. Her eyes rolled up into her head.
"Oh, God, you're so big." Even with the physical changes I'd made to her body, she could only take about ten inches of my cock before I ran into the back wall of her pussy. That left a couple inches outside of her body, but I didn't care. I could feel her cervix, under pressure from the head of my cock. Looking at the place where we were joined together, I marveled that she was able to take my cock as well as she did. Her pussy stretched obscenely around my shaft, the skin of her pussy pulled tight, slick with her juices. Katey just settled there on my rod, enjoying the sensations. She flexed her muscles, causing me to groan with pleasure again.
Starting a leisurely reciprocating motion, she lifted up three or four inches at a time before sliding back down, leaving the majority of my cock buried in her. Slowly she picked up her pace, getting used to my size, lubricating her tunnel, enjoying the beautiful friction. I reached up to place my hands on her breasts, small as they were. I loved them, they were perfect on her body.
"Yes, play with my nipples, Mark." I gripped each of her nipples between a thumb and forefinger, gently pulling and twisting.
"Ohhhhh, yes," she moaned sliding up and down more quickly now. I glanced down again, watching as the liquid from her pussy clung to my shaft, and slid my hands from her breasts to waist, incredibly thin. I didn't have big hands, but I could encircle a good chuck of her waist with them. And to think, of the totality of her waist, three inches of its diameter was currently occupied by my cock. I could see a faint impression of my rod pressing her abdomen outward every time I thrust into her. Girls were amazing creatures, I mused, especially mine.
"I love you, Katey." I said it, and I meant it. I wanted to spend my whole life with her, and just her.
Her eyes still closed, pussy sliding over my cock, leaning back now, she replied.
"I love you, too, Mark." Barely a whisper, but I heard her clearly. She picked up the pace again, lengthening the strokes she was taking, me helping by thrusting up into her at just the right time to maximize the pleasure of the act. Her whole body undulated, grinding her pussy onto my cock. Changing the angle of her attack, she leaned closer to my face and scrunched her face in pleasure as her clit was driven against my body. She picked up speed again, and I moved my hands to her hips, holding and guiding her. The friction of her walls sliding past my cock was intense, and I could tell she was feeling the same.
I could tell she wasn't going to last much longer, and I was getting pretty close myself.
"Mark... I'm gonna cum. Cum with me!" she grunted out, her movements becoming faster, more spastic as she climbed the last hill to her orgasm. I pistoned up into her, starting to release control. My cock was growing larger, stretching her pussy even farther, and my balls were contracting up next to my body.
And... that's when my mom opened my bedroom door and walked in. My eyes went wide and I locked up. Katey also stopped moving, but for another reason. Her back arched, her chest thrust out and her muscles all tensed as she finished the climb.
"Ohhh. Ohh G-god. Ugh!"