Yes, with the help of the desk

Rather than get dressed, I simply prop the silk robe on the edge of desk. This gives the desk a bit of padding as I sit down on the corner, pressing my pussy against the desk. Once I'm settled, I begin rocking my hips as if I was grinding against a beautiful woman. That or riding a nice dick.

As I look to the blinds, I realise that there is nothing I can do if someone walks in on me. They'd see me masturbating on the desk. Even better, I'd be at the complete mercy. If anyone from the class wants to bend me over and give me the fucking I crave, they would have me right where they want me. Although it might be better that I finish up quickly, I know what I'd rather have happen.

My juices are likely soaking onto the robe. Hell, Magnus' desk will probably smell like my pussy for the next few days. I wonder if he'll wash the robe, or if he will huff on it. Either way, there's a good chance that he'll know exactly what I've done.

Each and every motion, I bring myself closer to climax. At this point, I don't care if anyone is watching or hearing me. I need this orgasm. I need it more than oxygen and water combined. My knuckles turn white as I feel the sensation build inside of me. Any moment now I'm going to finally experience the very thing I haven't been able to stop thinking about since I started this whole process.

When the o that I've been craving oh so much hits, it hits like a wrecking ball. My body collapses onto the desk, knocking over some of Magnus' stuff. Not that I cared. Not as ecstasy pulsates in every nerve of my body. Not as I quiver as each after shock grows duller and duller until the sensation subsides. Only then do I realize exactly what I've done.

In a rush, I try to tidy up Magnus' things as best as I could remember. Of course, I didn't think about how his desk was laid out. In fact, I'm not really thinking much at all. All I can do is try and get it right as best I can. Once I'm done with his desk, I rush to get back in my clothes. As soon as I'm dressed, I hurry away, not daring to look at any clocks that can tell me how late I might be.