I sighed. For, yet the fifth time, Mattie had failed to earn her red belt. A few of her kicks had been off, and, honestly speaking, her punches hadn't been the best either. But, as she looked to me, I could barely find it in my heart to deny the girl one more time. She looked so hopeful, straight black hair framing a smiling cherub face. Her green eyes always melted my heart, and her body was just developing, little breasts barely pushing her white karate suit. Oh but she looked so cute! "So? Did I make it Master Xia?" her broad smile broke me out of my reverie.

Sighing, I shook my head, trying to look as gently sympathetic as possible. Her face fell.

"What'd I do wrong this time?"

So, for the next half hour or so, I showed her how to do the right moves. The studio, with its mirrored walls, was absolutely empty for now. This was a private lesson that Mattie had begged for. She was one of the most determined people in my class, and yet she just didn't seem to get some awkwardly basic concepts. Well, it didn't bother me TOO much. Each time she stayed after, I was paid extra by her smiling mother.

But, by and large, the lesson ended. Giving each other solemn bows (she nearly collapsed, giggling, at the formality), we parted ways. I left the mirrored room as she changed, trying my best not too look behind me, or find an excuse to. I went to my office, where I ran the website, checked my schedule, browsed the web, and (only occasionally!) watched porn.

I first went to finances. They were quite stable. I didn't make the best of profits, teaching little kids how to defend themselves, but my prices tended to be the cheapest, so more of the parents who believed that karate was just a phase came to me. And the stupid adults who thought it could be a way to brutalize their enemies. For the serious beginners, who really wanted to learn, I taught the basics, then guided to someone better. They deserved to learn...

Mattie Shafer was one of the kids whose parents decided this was a phase. And yet, in my years of teaching, I had never seen a person as determined as her. Still, apparently only I saw this side of her. Some of my colleagues here, Master Feldmann especially, seemed to think she was too frivolous, and, looking at our lessons a bit deeper, I could easily see where that came from.

My eyes hit Mattie's account. My God! A line of red, overdue, or unpaid payments stretched back quite a ways. I was confused and stunned. I remembered that each time, Mrs. Shafer had paid me with a check, through Mattie. Then it hit me. Groaning, I dug further back into the finances. Of course. Each and every one of the checks from a certain point on had bounced.

Although I didn't NEED the money, it would have been good to have. We could finally afford a more fancy water dispenser than the piece of crap we used now...

Now, though, I just wanted to get home, maybe laugh a bit at Big Bang Theory or Scrubs, maybe talk with some friends on Facebook, but the rest of my night was somewhat ruined. I tried not to let my anger turn to little Mattie, but she had kept me after so many times...

The sky was still reasonably bright; after all, it was only 6:00 and Daylight Saving Time at that. I was so wrapped up in my thoughts that I almost tripped over Mattie as I walked out. She sat on the concrete steps, looking a bit forlorn, clothing and equipment bag right next to her. She was wearing a pink shirt with one of those My Little Ponies on it, and tight shorts that went down to her knees.

My animosity vanished as I saw her face turn hopeful as she saw me, then fall again. She sighed.

"Have you seen my mommy?" she asked me, voice filled with dismay. "I called her, but she didn't pick up..."

I shrugged, desperately wishing I could help. Her face tended to do that to me; it was one of the reasons I actually gave her extra lessons, even after dropping hints about other studios to her mother. I sat down next to her, in my jeans and t-shirt, and gave her a one armed hug, not too close as to be creepy, but reassuring.

"I wish I had, Mattie, but..." I trailed off. I was originally going to send an e-mail and a letter to Mattie's mom about the payments, but I figured a message carried by her endearing daughter would be difficult to ignore. "Oh, and Mattie, can you tell your mom she needs to see me about her payments? They've been late for a long time, and if this continues, I can't keep teaching you." I gave her a frown, as if I didn't want to happen. And I didn't.

At this, Mattie's face seemed to be lifted, as if by some sort of cautious hope.

"Yes, about that, Sensei Xia...ummm...can we go back into the studio? Please? I think I left...something in there."

I raised an eyebrow. "And what did you leave?"

"Something...important," she said lamely. "Please? Please? Please?" She gave me the puppy dog eyes. I sighed.

I followed her to the mirrored studio again, and flipped on the lights. The room was empty. I looked to Mattie, who had gone to one of the corners and thrown down her bag. "Mattie, we can't continue our lessons, you know that."

"I know..." she said, a bit resigned. "The truth is, mommy won't let me take karate any more unless I find away to pay for it myself, but..." Wow. Despite the fact that I was the cheapest instructor in the area, karate lessons weren't cheap, especially the private ones that Mattie had been begging for. Then something hit me.

"But Mattie, what about those checks your mother wrote? Why..." Something ELSE hit me. "Did you fake those?" I asked with dawning horror. She nodded, looking absolutely miserable.

I spluttered at her for a few moments before I ran out of steam. This was the kind of thing I would love to deal with, but couldn't. Instead, I turned my voice cold.

"Very well. You do understand I can't keep teaching you. After today, if you don't come back with something REAL, then don't come back at all." Great. Now I sounded like Scrooge.

Mattie looked up, hurt, her eyes brimming with tears.

"I don't have the money, but I have something else..." She ran to her backpack and took out a paper packet, then ran over and handed it to me, looking hopeful. "I heard that men liked these somewhere on the Internet, once."

I was intrigued, so I opened the packet and looked inside. Photos? I took a few and riffled through them. Each one was of Mattie, wearing little to nothing, on a plain background. In one, she wore cute lacy panties, and thrust her chest at the photographer insolently. Her one-piece tan lines were obviously visible, and the contrast between her tanned arms and legs and her pale body almost made me laugh. Surprised, I kept on going, and each photo was the same idea, Mattie posing nude or close to nude as possible. I finally stopped at one where she sat on the ground, legs splayed, hands pulling apart her pale vagina lips to reveal the pink inside. She was grinning insolently here.

I slid the photos back into the packet, trying my best to avoid a hard-on.

"Where did you get these?" I asked, my voice neutral.

"My daddy," she responded. "But that doesn't matter. Are they enough?"

"Well..." I looked at the packet. "The thing is..."

She looked sad. "I knew it wasn't enough." Resignedly, she began to take off her shirt.

"Whoa, what're you doing Mattie?"

Her shirt was off. Her pale breasts contrasted with her darker skin, and I could see the swimsuit tan. It was adorable.

"Well, if that's not payment enough, I'm going to have sex with you."

I tried my best not to show surprise. Mattie was one of the prettier girls I had seen here, and I truly did love her. But did I love her in that way? My hardening cock said yes. But it was illegal...then, suddenly, that didn't matter. Mattie tapped me on the head. "Sensei? I'm ready."

I looked up, and my eyes nearly flew out of my head. Mattie stood posing, hands on hips. Her black hair shined in the light, and her green eyes glinted with hopefulness. The her tan lines were extremely obvious here.

The mirrors in the room were amazing. They reflected every aspect of her nubile young body, and I tried and failed to make it look like I wasn't entranced. She noted my hungry looks, and began to walk toward me, attempting to be sexual. When she reached me, she took one hand and began to massage my cock area through the jeans, and took the other and began to push my shirt up.

I stroked her hair, trying my very best not to seem sexual. "Mattie...why are you doing this?"

She shook her head. "Because...I want to continue to learn." It sounded fake, but her voice filled with a tentative enthusiasm as she swiftly pulled down my pants and boxers.

My long, hard cock popped up, and Mattie eyed it as if it were a monster. But apparently, she knew what to do here. She moved her mouth to the tip and began to suck it, while both hands worked the shaft, pumping up and down and up and down. My cock grew harder and harder, as I watched her black hair bounce up and down as she sucked. It was a scene right out of a sex movie.

"Mmmmmmph." I looked down, stunned. Mattie had taken my cock and gotten it halfway down her throat. Her hands were now pumping at the very bottom. Stunned, I patted her head, impressed.

"You're doing...very well." I said lamely. Her eyes seemed to smile at this, and I felt that some of their life seemed to return.

It wasn't very long before the stimulation got to me. Her small, hot tongue stroked the tip and the shaft as her mouth worked its way down. Her hands never ceased pumping up and down, and, every once in a while they'd move to play with my balls.

I came when my cock was all the way down her throat.

"MATTIE!" I roared, gripping her head hard, and ignoring her muffled protests and coughs as I held her down. Spurt after spurt shot down her throat. I closed my eyes and let the ecstasy overcome me.

Presently, I opened them again. Mattie was squirming, and her eyes begged me to let go. Startled, I did. She slowly pulled herself up and off, cleaning my cock on the way. Then, like a professional pornstar, she opened her mouth and showed me exactly how much cum I had shot. Then, with a grimace, she closed her mouth, swallowed, and opened her mouth again. Empty.

I gave her a hug, feeling her warm, small body through my thin shirt.

"You should never, never do that again." I whispered close to her ear. "Not until you find someone you love."

She spoke, muffled through my shoulder. "What if I have to?"

Mattie broke the hug first. She looked radiantly alive, smiling, and determined. I couldn't piece together what it was, even after she got into a sex position. Her ass and pussy tantalizingly pointed at me, and she looked back. She placed her hands on the mirror to support herself, and, in this position, I could see every last bit of her pretty little body. She gave me a mischievous grin.

"C'mon, Sensei! What're you waiting for?"

So I didn't wait. Stripping off my sweaty shirt, I stood behind her, poised to enter. In the mirror in front of us I could see both of us, in our nude glory. Mattie was smiling, of all things.

I chose her soft, sweet little pussy. As I entered however, I noticed it felt...dry, and that Mattie was trying to hide her pain. So I pulled out, and she looked at me, surprised. "What?

What's wrong? Am I not good enough?" She actually sounded hurt.

"No," I said softly, as I went down to her pussy. "Only this."

I heard her gasp as I began to lick her precious little vagina. It was adorable how she moaned and groaned, how her legs began to shudder a bit with pleasure. My hands joined in, fingers probing gently.

"Sensei...please, please don't stop! Oh, keep on going! Oh, let me cum, Sensei, please let me...CUM!" With that last word, she came, and I had to support her as her legs gave way. Her pussy was well and wet, now.

She propped herself back up as soon as possible. "Now...will Sensei enter me?" she asked. Mattie was vivacious and happy, glowing with life. I gave her a little pat on the ass as I assured her I would. She smiled happily.

And so I entered her, her warm, wet, tight vagina. We went slowly at first, preparing, and her face in the mirror showed pure ecstasy. As I moved faster, harder, slamming deeper and deeper inside her, she began to cry out.

"Fuck! Oh, fuck me harder! Harder! Yes, yes, yes!"

I couldn't hold it in. My hands cupping her breasts, my cock penetrating deep inside her, her scent pervading my nostrils. I just couldn't hold it in. I moved faster and faster and faster, and we were both animals near the end. I felt her cum, barely, through the haze of lust, and I came not long after, releasing myself deep, deep into her immature body.

Afterwards, we still stayed together, enjoying each other's warmth.

Finally, she spoke. "So, can I still keep coming to learn karate?"

"Yes," I responded hoarsely. "But...where did you learn to do what you just did? What...why did you do it?"

Her face turned more serious, and she pulled off my cock and went to her bag. "Don't ask any questions," she said, her face sad, "and I'll tell you no lies. Just...take it as payment. And I'll keep on doing it. Deal?"

Hell. I was caught. I had the photos, and I already had sex. So... "Deal. But where did you learn to do these things? And how did your dad get those pictures?"

She shook her head as she dressed. "No. Just...don't talk about it. Please, don't. We can keep doing it if you want, but...please don't talk about it."

I abided, but secretly told myself I'd find out more, somehow, someday. We left together, not speaking. She looked a bit shy, a bit ashamed of herself. We exited the studio, and were back on the stairs where I had found her.

"Is your mom here yet?" I asked. "Or do you want to call her again?"

Mattie shook her head. "My mommy was always here." She ran off to a car in the parking lot, where a black-haired businesswomen sat, watching Mattie and me with predatory eyes. I shook my head. Someday.