I've been watching him for weeks. I know he likes my skirts because I catch him looking. Now, I'm not about to say I don't absolutely love Friday nights in the boys' locker room, but there's something about him. He's an easy target, I guess. Young, just so teaching. He's about my sister's age. Only about... six years older than me. I walk up to his desk. He can't keep his eyes off me. My top is tight with a low neckline. I skirt barely to the middle of my thigh. He's squirming a little, waiting for me to ask a question. Hopping it will be about the stuff we covered across today. Well, fuck that. Math is my best subject, and I know my way around an integral. This is about him. I get very close to him. He tries to back away. But I see that huge rod in his pants. Yeah, I already knew it was there. I see it, and I very sit in the front row, teasing him. Without a word, I reach down and start rubbing his cock through his pants. He knows what I want, and he's going to give it to me. I pull his big, fat cock out, and we see both fear and anticipation in his face as I begin to suck. Up and down, up and down. We're listening as he tries to stifle himself. He goes off quick, and I swallow it all, but he stays hard. He must have needed it. Then I roll a condom over his cock. Of course I have condoms. I'm always prepared. I bend over to his desk, put my tiny phone to the side, and tell him to take me. His cock is a big load for me. But I'm so wet, it slides right in. One hand upon my hip, the other is up and down my skirt. Now I'm the one trying to be quiet. He's fucking me so good, and I tell him. He goes slow for a while, and then speeds up before taking it back to slow. All the way out, then all the way in. He's doing crazy things to my nipples, but he calms inside me, and I come. I just can't keep making some noise, and that's when he comes. I pull my skirt back down, and smile at him. Thank you, sir, I say, and grab my books and hat. They bust up. I can swear I heard him humming. Don't stand so close to me. Well, with that cock, I'm going to stay close indeed.