Since entering the sexual mayhem of my university professor and his wife Sophie I had embarked upon a frenzy of new sexual experiences. After my last session I was exhausted and I had spent the rest of the week mainly in the University library, dozing behind the huge piles of books I was supposed to be studying.
I had almost recovered by the weekend which was just as well as my girlfriend was coming up to stay. I did my duty, which is to say that I fucked her hard both Friday and Saturday night; but I almost made the mistake of trying to stick my cock in her arse. This was something I had never done to her before and which was not on her list of things to do with me or anyone else for that matter. The trouble was that I had experienced so much sexual variety recently, that it now seemed quite normal to fuck her in each vacant hole. The contrast between my girlfriend's conventional courting and the passion of the Prof's sessions was hard to adjust to, I felt off balance and slightly queasy with life.
However, this feeling didn't last long and after a quiet start to the week I received an e-mail from the Prof.
"We would like to invite you to dinner on Thursday evening if you are free. Apart from you there will be one other guest."
I replied in the affirmative but wondered who else would be there and what they would be like. As I let my imagination embrace the Prof's potential for sexual pleasure, a tingle ran up my cock and it thickened to hardness. I steadied myself, I would need all my strength if I was to play a full part in the Prof's next orgy - these pastimes weren't spectator sports.
On Thursday evening as I walked through the streets of Victorian houses on the way to the Prof's dinner party my cock was swollen with anticipation; although a certain nervousness in me had prevented it from gaining a rock-hard state. Who would be joining us? Male, female, young or old?
I soon found out as the Prof opened the door and led me into the front sitting room. There perched on a pale green sofa was an exquisite young woman of maybe twenty. The Prof introduced us somewhat formally,"Michael, this is Amelia."
She stood up and shook my hand. Amelia was a pretty blond, quite tall, lovely legs and small boobs. I fancied her from the start.
"Amelia's in her final year" the Prof said, "and she's a keen student." There was a clear double meaning in the Prof's words and his wife Sophie giggled out an "Indeed she is!"
After small talk about subject courses and post-graduate opportunities it was time for dinner. As we withdrew into the dining room I walked behind Amelia, watching how her firm arse cheeks moved under her tight mini skirt. I started to get hard.