I had been making love to Amelia for most of the afternoon. Her pussy was now so open and so wet, that her juices were oozing down her thighs and saturating my balls. So much relentless fucking had made her cunt very slippery, and as my cock kept sliding out I switched to fucking her in the arse. This was much tighter and by reaching round and gasping her tiny tits I was able to steady myself and maintain a constant rhythm.
It seemed strange that the beautiful, firm rounded arse that I was fucking had been sat primly on a seat in the English Department's lecture hall only a few hours ago. It wasn't as though Amelia was even my girlfriend, we were rather two people willingly swept up in the Prof's and his gorgeous wife Sophie's sexual adventures.
I liked Amelia a lot - she was prim, proper and posh, but she also had a quirky sense of humour. She could also be surprisingly shy, one moment looking bashful and the next fingering my arse and sucking my cock as if there was no tomorrow. Next year she would graduate from the University; no doubt taking that divine arse back home to London, no doubt marrying her dull boyfriend Simon. The boyfriend who had never fucked her in the arse, but who was coming to stay with her for a weekend visit.
Amelia began to rotate her firm little rear faster and faster, and any thoughts of anything else quickly left me as the sensations in my cock increased in intensity. A few more turns and I would cum. Suddenly her phone buzzed. I hardly heard it, but Amelia did. She stopped moving and leaned forward to reach it. As she did so her contracted buttocks ejected my cock. She quickly sat up.
"It's a text from Simon," Amelia said.
She paused for a moment, staring at the phone. The nipples on her small breasts stood out pink against her pale skin. She looked puzzled.
"It must be urgent."
I was frustrated by this interruption and I tried to slide my hands between Amelia's legs to renew our action. I needed to get my cock back into her body. The sperm churning impatiently in my balls was agony and it needed release; but Amelia shrugged me off.
"Simon is coming up on Wednesday. Oh my God that's tomorrow!"
I realised the problem. "We are meant to be seeing the prof and Sophie tomorrow night."
Amelia nodded her head in agreement "Yes! They won't like a postponement as one of the Prof's friends is coming."
She was becoming increasingly agitated and now sex with me was firmly off the agenda. She sighed deeply, sank back on the bed and pulled a pillow over her face. I knew when it was best to leave her alone, and that was now.
After what seemed like an age she threw the pillow off and stared at the ceiling, then said "You could go on your own? I have to see Simon; I couldn't possibly let him down."
"They wouldn't want me on my own, can't you put him off?" The full implications of Simon's early arrival began to hit me. "You know the Prof will go mad - and who knows where that will end?"
"No, it's impossible," she said creasing her brow.
"Nothing's impossible."
"This is."
Amelia sat up and carried on talking while she looked at the wall.
"You could go as Jane."
"That's a joke right?" I replied.
"No, you could. The Prof would love it, it's probably the only thing that could get me off going."
"Look, I've told you before - being Jane is off the agenda."
Basically, being Jane was me putting on women's clothing, looking like a slut and having sex with all three of them. The Prof in particular was most keen on the idea, it seemed to drive him wild. Always in search of new pleasures the two females had both put pressure on me to comply.
At the time it was first suggested, Amelia had said "Well Michael I wear women's clothes every day and it hasn't done me any harm," and with that she had raised her short skirt to reveal a pair of divine black panties. Sophie had pointed out that the Prof had already fucked me up the arse, which in her view certainly took more effort on my part than dressing up as a teenage slut. But at that time, it didn't feel right. I hadn't done it before and anyway I hadn't wanted to be pushed around by those two.
Amelia turned towards me and fixed me with her beautiful doe eyes. She tilted her head slightly as she looked at me, she was trying to hypnotise me with her sexual power. She spoke very slowly and very softly, almost in a whisper.
"Michael, I am asking you to do this for me as a very special favour." Amelia sighed deeply. "It is very important to me," she paused then slightly raising her voice she repeated "It is very important to me."
She continued to hold my gaze when I didn't reply.
