I grabbed her long, black hair, forcing her head down into my office couch cushions. Her whimpers turned into muffled screams as I mercilessly pounded away at her barely legal pussy. My cock throbbed as I roughly groped her tits.

Her tennis skirt and white panties were carelessly scattered on the floor while I was still fully dressed. I had opened my shorts enough to get my dick out in a hurry. She had been quite the tease the past few weeks, always pushing my boundaries, always seeking attention. I wasn't the most principled person before that day, but I definitely crossed the line in a way I shouldn't have. That wasn't the only time I fucked Grace. But it was the first.

How did I end up using my student like she was a dirty fucking slut?

Tennis has always been a passion of mine. In my late 20s, a golden opportunity presented itself: a coaching position opened up at my local country club. One of my clients was Grace, or more accurately her father. I first met the two of them shortly after Grace’s eighteenth birthday, the summer break before her senior year. Initially, she seemed shy, hiding behind her dad as we discussed the deal. But over our first few lessons I discovered that tennis was her only outlet, as her strict Asian parents forbade team sports and cheerleading. I admit, I couldn't help but ogle her thick thighs, tiny waist, and big tits. I knew that my students should be off limits, but I had a hunger for Grace. She often wore tank tops and short skirts to our lessons leaving me to wonder if she was teasing or genuinely flirting. Her juvenile innuendos during conversations further fueled my desire. I convinced myself that a little harmless flirting wouldn't hurt.

Grace was a diligent student, but often very stubborn and often refused to listen to my advice. She preferred her own methods, leading to repeated failures. This frustration sometimes made coaching her difficult.

Everything changed one rainy spring day. We retreated to my office, a basement room with a couch, a desk, and a few chairs. Usually when it rained we would watch her matches and I gave feedback. Grace had a white tank top and a matching white skirt that clung to her body from the rain. She bent over to pick up her duffel bag, her movements deliberate and suggestive.

“I’m wet all over”, she said, scratching up her thighs and pushing up her skirt.

Something came over me. The rain had cut our practice short, and I was already frustrated. I moved closer, placing my hand on her back.

“Are you really wet all over?” I asked.

She pushed her ass against me, starting a slow grind against my growing cock. I gripped her shoulders, my resolve weakening.

She turned around to face me. “Yes. I’m wet alll over. It happens a lot around you.”

Despite my obvious lust for her, I hesitated. The consequences of crossing the line were severe. But she made it easy for me when she tiptoed and kissed me. With that, something inside me flipped. The forbidden nature of the moment overwhelmed me. I fumbled frantically with the zipper at the side of her skirt. I didn't ask what she wanted and she didn't say a thing as I pulled her shirt over her head and lifted her sports bra.

"Your tits are even bigger than I'd imagined" I whispered in her ear.

I fondled them roughly and twisted her big nipples, enjoying myself. Groping her breasts was quite satisfying given all the frustrations she caused me as my student. But it wasn't enough for me. I spun her around and bent her over the arm of the couch. I moved my hands to her panties and pulled them off quickly. Her pussy was soaking wet. Her tight little twat perfect for being filled by my big cock.

The forbidden nature of the situation only made me want to fuck her harder. She moaned loudly, so I silenced her by shoving her face into the sofa cushions.

"No one can hear us," I growled.

I started slowly, savoring the moment as I filled her for the first time. "You've been a terrible student, Grace," I taunted. "This is what happens to bad students." Grace tried to respond but I kept her face down in the cushions so all she could do was moan.

I fucked her harder and faster. She whimpered and moaned as I pounded her inexperienced pussy. I fucked like I wanted nothing more than to fill her cunt with my cum. Of course, I knew better, but the fantasy was too intoxicating. I pulled out and came all over her ass.

Afterwards, a wave of guilt washed over me .

"This has to be our little secret, Grace," I warned. "We could both get in a lot of trouble if anyone finds out. I could lose my job, and your parents would NOT be happy."

She left without saying much, her expression a mix of fear and excitement, but the mention of her parents made her noticeably wince. The next day she showed up for her lesson. I acknowledged what happened was wrong and that I had acted on impulse.

She agreed with me and promised it would be our secret. Then she added, “It would be our secret if it happened again.”

"Is that what you expect? That it will happen again?" I questioned her.

"I wouldn't mind it," she confessed. "Boys don't notice me. And I have all sorts of things I want to try before I go off to college."

"I have a hard time believing boys don't notice your incredible body," I responded.

"They think I'm a nerd. They don't want to be seen with me."

"Boys don't know what they like yet. Get on your knees."

I let her fumble around with my cock, but eventually I grabbed her dark hair and fucked her face. I made her swallow my cum. That was the start of me teaching Grace a lot more than just tennis. We did filthy things almost every time she had a lesson after that. Sometimes we would play tennis first. Other times, I was essentially getting paid by her parents to have sex with their daughter. She would read about things online and ask for them. I taught her exactly how I like my cock sucked. How I wanted her to dress. I helped her buy toys and slutty lingerie. Eventually, our affair ended when she went off to college. But I’ll always remember that first time, the frantic energy, the thrill of dominating her innocent body, and the transformation of my student into my obedient little slut.