This week was my turn to be working in the non-free use section of the school, so that meant all the students who weren't 18, once they turned 18 and got their license, they got moved into a free use class in that wing of the school.

Honestly working in the SFW wing has its advantages, the staff can still use each other if there's no students around. But it is nice to be able to get through a lesson without a student squirting on your legs as you walk or being late for a class because of students pulling me aside, or seeing someone and pulling them aside myself, to be used. It can be exhausting, and then if you have already cum a few times today, a student can be disappointed that they didn't get a big enough load so you have to remember to get to them early the next day. It's a lot of fun, just sometimes it can add to the workload. I think it's more intense for the female teachers though, they're basically walking cumrags by lunchtime.

Anyway, not to be a hypocrite, but this day I was teaching about the "Rebel House" of 1846 while sitting in the position I've found where I can just see into Hillary's room in the free use wing. Her method is to assign a task and then strip nude and bend over and let whoever do whatever. So from my position I could just see her face and tits pressed up against the window as someone railed her from behind.

The lesson ended and I dismissed my class, wondering which teacher I'd fuck during my free class next, when I realised that Megan was still in the classroom.

"Oh! Megan! Can I help you? Do you understand the homework?"

"Yes, Mr. Williams, I just wanted to tell you that it was my birthday yesterday"

"Oh...okay, happy birthday so".

I assumed that was it and she was just looking for some acknowledgement, then I froze when she placed her brand new, still pristine free use license on my desk. I am the unofficial head of the free use wing so I assumed she was letting me know for admin purposes.

"Oh, great! Congratulations! Let me know your optional subjects and I can find a class-"

"No, Mr. Williams, I'll go through the secretary for that... I em... I'm just really thankful that you organised the free use wing and... I think as a thank you I want you to be my first."

"Your first teacher? Yeah no problem! Just let me finish up here and-"

She cut me off again:

"No. Not my first teacher. My first."

The enormity of what she was saying landed on me like a tonne of bricks.

"Oh, oh my god, I'm honoured, but surely, a class mate, you're good friends with Tim and em..."

I trailed off as she pulled her school jumper over her head and then started unbuttoning her blouse. She was wearing a bright pink bra that was visible through the white of the shirt and stood out against her blonde hair. She looked nervous but, excited.

The blouse came off and fell to the floor beside the jumper. Then she shimmied off her skirt and stood there, wearing underwear to match the bra, an incredibly tight figure with perky smallish tits and a little camel toe visible through her underwear.

"Are you sure?" I say as feel my cock responding to the sight in front of me.

"You know, since I have my license, I could have just started without checking in first" she said as she straddled me and started gliding back and forth. I reached up and gently undid the hook of her bra. She lowered her arms to let it fall. I immediately grabbed both her tits and started playing with her small nipples, almost no areola. She immediately started breathing more heavily as they responded to my touch.

Then she slid off my lap and onto the floor. She started unzipping my trousers and then pulled my boxers down, before pulling both completely off.

"Oh wow! I never, I've never... This is so different from porn." She said as her hand nervously grabbed my cock, after a few gentle strokes she leaned in and flicked her tongue out to just touch the tip. She seemed to like the sensation as her eyes widened and she put my cock in her mouth and started sucking.

I enjoyed the sensation and softly put a hand on her head to guide the rhythm. Then I pulled her to her feet, she let out a slight sigh of disappointment as I did, then with her standing in front of me, I pulled her panties down and told her to sit up on my desk. Her pussy had borne hair surrounding it, trimmed rather than shaped. Without speaking, I pushed her legs to the side and I touched her virgin pussy with one finger, slowly caressing it and moving from the lips in towards the slit. She was already so wet. She gasped even from this level of touching and lay back on the desk. Careful not to go to fast, I slowly applied more pressure each time until my fingers were running up and down her slit up to the first knuckle. I went a bit deeper and found the unmistakable nub of her clit. Her squeal confirmed it after a few flicks. I moved my finger back down and leaned in myself, finding her clit with my tongue and rubbing over it vertically and horizontally, with my finger moving further and further in. I added a second finger and Megan actually screamed. I started properly fingering her now, genuinely not having room for more than two fingers because of how tight her pussy was. As I did this while tongueing her pussy, she started bucking up and down on the desk and then she screamed so loud that the class next door must have heard it.

I removed my face from her pussy and stood up, looking at her sweaty, panting body and the look of dazed satisfaction on her face.

"Are you ready?" I asked.

"I've been ready for so long, please fuck me Mr. Williams, take my virginity." And she let her legs fall fully to each side.

I needed no more permission than that, I stepped forward and started pressing my dick against her pussy, it was so wet that I didn't have to apply any pressure, I just slid in. Well, it was so tight that there was still some effort involved. She gasped and grabbed at her boobs, completely unable to process how intense this felt. I went about a third of the way in and then out until just the head was inside her. Then about half, and then I pushed until I was balls deep. She screamed again and I hoped I wasn't hurting her too much. I started thrusting then, gently, as she got used to the sensation. I put my hands on her hips and started using them as an anchor to increase the tempo and force a little bit. She responded by wrapping her legs around me, so I decided we were good to go despite the slightly strained look on her face. I started thrusting harder, hearing the sound of my thighs banging off the table. She was so tight that it was harder to move back out of her pussy than any pussy I had ever had. I felt myself ready to cum so I asked her where she wanted her first ever load. She looked at me and said "please cum in me, I want it". So I did, I gave five or six more hard thrusts and then bent over as I shot my load up her pussy, I sucked her nipple as I was cumming. And then I slowly pulled out. She pushed a little, just to let some cum go to the surface, and then she reached a hand down, rubbed it, and brought that hand to her lips.

"Thank you" she whispered as she tasted my cum and her own juices.