Author's note: Not everyone appreciates May-December stories that involve incest, so if that is you, this story isn't you.
*
Trey, a young student who had just lost his university Professor father, Pieter Strauss Jnr, himself son of another Professor, Pieter Strauss Snr, has a holiday fling with a mature lady, Sarah, then later learns that she is in fact his father's sister - his aunt - and his father's replacement at the university. They decide to live secretly as a couple while looking simply like Aunt/Nephew house mates to the outside world.
This story takes place during the second term of Sarah's first year teaching and Trey's third year as a student.
Sarah and Trey were, to the outside world, a very comfortable aunt and nephew sharing accommodation in what had been his father's house. In the house, they were a loving sex-indulging couple who preferred to be naked as much as possible. After having had a visit - over Thanksgiving - from one of Sarah's previous lovers, Jenny, they had had a quiet and romantic Christmas, just the two of them, and had settled into a nice routine. Trey had found his lover/aunt didn't treat him any more generously than his father had when it came to marking his work, but in fact his marks on all courses were pretty good.
One evening, after enjoying making love by Sarah riding him as if he were a bucking bronc, she collapsed on to the bed on her back beside him.
"Answer me a question honestly?" she said, looking at Trey.
"Of course."
"Is our sex life enough for you?"
He peered at her and remained silent for a while.
"Well, is it?"
"If my recollection is correct, I think there have been four times in the last 4 months when we have gone 24 hours between love making, and usually a lot less, so I'd say it is. You think otherwise?"
She sat up and turned towards him. "I told you early on, when we first started living together, that I had been quite promiscuous in my prior life. I didn't have someone I was prepared to be monogamous with, and I did enjoy having new conquests in my sex life, with both men and women. It was a rebellion against my father, your grandfather. Your previous experience was far more limited than mine, and I wondered if you missed having some erotic adventures in your past, or would like some in your future?"
"Never really thought about it. I think we have been quite adventurous, just the two of us, and with spring approaching, I am looking forward to going up to the cabin and making love al fresco, so to speak. But erotic adventures in the future sound interesting. I had had a couple of flings with young ladies, nothing serious."
"Ok, another honest question? Have you ever been with a man?"
Trey blushed. "Just once. Was just before my 23rd birthday, so almost a year ago, just before dad was killed. I was up at the cabin with a class mate, and we skinny dipped. When we laid on the dock, he took my cock in his hand and sucked it. It was different somehow to how a woman does it, somehow more possessive, and we went into a 69 after a while. It felt good. That night, he fucked me.... My one and only time."
"Seen him since?"
"Around the university, yes, in bed, no. He transferred to the West Coast during the summer holidays, so he's gone gone now."
"Would you do it again? With someone else?"
"Perhaps... the chemistry would have to be right, and the person not very hairy. Hairy men turn me off."
"You're not very hairy, so as long as he's no hairier than you?"
"Probably."
They laid quietly together for a while, then Trey spoke. "If we brought someone else into our relationship - male, female, couple, whatever - it would have to be like when Jenny was here. Both of us involved, together, all the time...."
"Agreed," said Sarah.
They curled up and went to sleep, and for the next couple of weeks, continued their normal routine.
One Tuesday evening after they finished watching the Jeopardy! recording (naked as usual) Sarah poured them a couple of night caps and sat back down with them. "I've been thinking," she said, "of hiring someone as a marker and to prepare hand-outs to students. The Dean wants me to do some other Calculus teaching to do with Product Engineering and Design, which will eat into time I currently have available for marking. The person could work in the outer half of my office, where the main door with the window is, and could also protect my 'sanctum' from unwanted visitors."
"Someone in mind?"
"Well, you know that young Professor next door to me?"
"Professor Li?"
"Yes. He's a professor but not yet tenured. His wife has a degree in math's including calculus and is looking for a job a little less than full-time. She could be ideal. They are both late twenties I think, and seem a nice couple, but there is something about them that I can't quite put my finger on. I was thinking of inviting them here for dinner and you could vet them for me... and you're an excellent cook."
"Oh, yes, flattery will get you everywhere. Ask them if they are okay with fish - most Asians are. I'm curious why you have reservations, though."
"Well, when I first chatted with her - haven't mentioned a job to her yet, we just had a casual conversation outside her husband's office - I got the impression she was kind of offering herself to me."
"You mean sexually?"
"Yes. Whereas her husband seems indifferent to me as a woman...."