Saturday afternoon, and the library was busy with people browsing, studying, and generally hanging around. I love working there. The sense of order and peace suits me perfectly. Life can be confusing sometimes, but in the library everything has its place, and everyone knows the rules.

Don't make too much noise. Don't make too much mess. Don't invite girls you meet online to share an illicit sexual experience with you.

It started off as a throwaway idea buried within the dozens of other messages we were exchanging. I didn't really expect it to happen, and to begin with she wasn't very keen either. She told me that thinking about it excited her, but also made her scared. I didn't push, partly because I wanted her to want it as much as I did, and partly because as soon as I suggested it, I regretted doing so.

It's where I work.

Inviting her there was stupid. At that point I didn't even know if she was really a woman. She could've been a man getting sexual thrills from chatting dirty to me and pretending to be female. Or even worse than that, she could've been some online troll who was going to show the real me to the world and humiliate me by revealing my deepest sexual thoughts to my colleagues and the borrowers who used the library. Even thinking about allowing my private and professional lives to overlap at all was reckless and dangerous and stupid and... so very, very thrilling.

She said no, and I forgot about it, glad that I hadn't taken it further. We kept messaging, the exchanges getting more intimate as we tentatively shared truths we rarely told anyone else. That's one of the joys of anonymous communication - you get to be the real you, without any of the filters or masks you need to use or wear with the people who actually know you.

Her name was Claire, she was a little bit younger than me, and she lived relatively near to me. In the end, I think it was the proximity that made it happen. That, and the fact that every time I thought about it (which I did, often) my heart would start to race.

In the middle of another conversation about our kinks I told Claire that I couldn't stop thinking about the idea of her coming into the library one day. She replied immediately, and told me she couldn't get it out of her head either.

We agreed it was risky. We agreed it was stupid. We agreed it was scary. We agreed it would happen the following Saturday.

For the whole of that week there was an added excitement for me at work. Every time a woman I hadn't seen before came into the library I wondered if it was her, checking the situation out prior to the day we arranged. Despite the fact we'd been talking for a while we hadn't exchanged photos, and neither of us had any idea what the other one looked like. I adored the sense of mystery it added.

And then, at 2.35pm on Saturday, Claire walked into the quiet, refined space of the library.

I knew instantly it was her, because I'd never seen anyone walk through those doors with such a terrified, anxious expression on their face. I was standing at the main counter, and my heart instantly began to thunder in my chest. It was actually happening. Fuck.

She was pretty. Shoulder-length chestnut hair, brown eyes, wearing a green knee-length skirt, white t-shirt and white trainers. Nice, firm little tits, a large, full arse and a small waist.

I saw her head turn to look in my direction, and I instinctively glanced away, pretending to be busy on the computer and totally oblivious to her presence. Out of the corner of my eye I could see that she was hesitating, clearly caught between staying or leaving.

My already racing pulse ramped up a gear when she walked into the main room of the library. Already I was wondering if her heart was racing as quickly as mine was, and if her pussy was wet. Making sure no one was watching, I gave my cock a firm squeeze through my trousers as I watched her arse while she walked along one of the aisles and out of sight.

We'd spoken about it. Of course we had. We'd talked about what we'd do and what we wouldn't do if she came into the library. We'd decided no talking, and no touching.

This was to be all about the thrill and excitement of pure anticipation. We wanted to share a public space with other people and feel the electricity in the air at knowing only me and her knew what we were thinking, what we were doing.

My phone buzzed softly in my pocket, the vibrations travelling through my balls.

I'm here

I could have replied and told her that I saw her, and that I was the man behind the counter, but I didn't. Today there were five staff members working; three male, two female. I didn't want her to know which one was me. I wanted to keep her in the heightened state of nervous excitement that I knew she was feeling.

Instead, I picked up a handful of books that needed to be returned to the shelves, noticing that my hand trembled as I did, and walked into the main room....

Claire's sitting on one of the reading chairs that are dotted around, a travel book on Brazil in her hand. I doubt she's put much thought into what book she picked up -it's more just a prop-, but she's definitely picked her seat deliberately. It's tucked right into a corner where two rows of shelving meet at right angles. There's enough space behind it to allow people access to the travel books on the shelves.

As I walk around the corner she glances up at me and our eyes meet. I smile casually at her, and walk over to the cookery section to her right and make a show of putting a book on the shelf, consciously not looking in her direction. But I can still feel her eyes on me.

I control my breathing, then turn around and face her.

Our eyes lock.

She looks nervous, and scared, and horny.

Her chest is rising and falling. Mine is too.

The soft background murmuring of the library fades. We're the only two people in the building.

And yet we aren't. I need to remember that. I need to focus on it. I need to keep at the very front of my mind that I'm at work. I'm in work. I'm working.

There's maybe ten feet between us, distance wise.

I'm still holding three books.

She smiles.

I walk towards her, and then past her, until I'm standing in the space behind her chair.

I check that no one is looking, and then I lean over her until my nose is an inch away from her neck, and I inhale her scent. Deeply. I take in an entire lungful of her.

Claire exhales softly, but keeps looking forward. The muscles on the front her thighs tighten and clench.

I straighten back up just as Alice, my colleague walks out from one of the aisles. She glances at me, nods, glances at Claire, smiles, puts a book on a shelf and then returns the way she came.

Close. Too close. And yet I can't stop. I can feel the adrenaline surging through me, and I'm a junkie for it.

I know I can't touch her. I want to. I want to reach over, push my hand between her legs and find out if her pussy is as wet as I think it is. I want to pull my dick out and turn her head just enough that she can get it in her mouth and suck on it. I want to finger her until she cums with my dick in her mouth right there in the library. Pull her up, bend her over that chair, put my hands on her hips and fuck her hard, not caring who sees us, not caring that I'll lose my job.

But, we agreed. No touching.

I step forward a pace and I'm standing beside her.

I turn, slowly, until I'm facing her. My cock is now so hard it's straining against my trousers. I press a thumb and forefinger either side of my and drag them along it, making my size and shape obvious.

Claire turns and watches.

I stroke it again.

She looks up at me and bites her lip. Her breathing is ragged and shallow. Her eyes are hungry.

I've never been in this position before. Wanting something so much but knowing you can't have it. And I can tell that she feels the same. It's a level of intensity I didn't know existed.

Then someone behind me coughs and I cover the hard outline of my dick with a book as I turn and walk away, passing the man who walks into our space and settles in one of the other chairs.

I look over my shoulder and Claire is staring at me, a little "oh well" smile on her lips. The spell is broken.

I walk back to the counter, planning on giving it a couple of minutes then walking back round to her. But less than one minute later she appears from the aisle and walks past me and out the door, without even looking at me.

It's over.

My heart sinks. There was so much more I wanted to do. So much teasing and playing we could've done, even in this place, even with those rules.

But, she's gone.

And then, my phone vibrates.

Have you ever been to Brazil? I've heard it can be very wet this time of year

I'm moving even before I've finished reading the text, walking as quickly as I can without running, back up the aisle, over to the now empty seat. The book she had been holding is resting innocently on the chair. But it isn't properly closed, because there's something between the pages.

I scoop it up as I pass, open it, remove what's inside, put it in my pocket, and then return the book to the shelf.

I know what it is, but the old man is still sitting on the chair and I can't look at it yet. I smile, thinking about the chance she took just to do this thing for me.

I walk out of the main room, through the door marked Staff Only, and into the staff toilet. The door is only just closed behind me when I pull Claire's panties out of my pocket.

They're pale blue, skimpy, with lace around the edges, and they are soaked in her juices.

I lift them to my face and inhale the sweet, earthy scent of her pussy. She smells incredible.

My phone vibrates.

I want you to cum into them, then send me a photo of it so I can imagine you came on me while I was wearing them. And thank you for today. I've never been so turned on. I want to do it again. Please?

I smile, put my phone away, pull out my dick, and get to work.