This is a work of fiction. Any resemblance between the characters and real individuals is coincidence. All characters are over age eighteen.
A mad mature scientist continues her experiments...
***
The following Wednesday, Professor Allenton texted:
"How do u feel about having my lab assistant come over 2. I think she could add a whole new dimension to our next exp."
"So I won't have you to myself. :-( You may have to force it on me."
"Consider it done."
When Professor Allenton let me in the door that evening, she held me and kissed me for several moments. We wanted each other right there, but, "Sienna will arrive any time, so we'll have to hold off a while."
"So what is Sienna's role in tonight's experiment?"
"Well, Sienna is just as committed as I am to promoting healthier sex lives for all. It's our way of making the world a better place. Oh, and by the way, we don't see anything wrong with enjoying our work along the way. I guess some people feel that science should be boring and unenjoyable. We feel it should be exciting. Sienna's role is to help out in any way she can. And..." Professor Allenton gently grabbed me by the elbows, "she's pretty hot and an active participant in the research."
I gulped and smiled.
Professor Allenton was right about Sienna. She was at least five foot ten, statuesque, about thirty I guessed, and had long dusty hair and an athletic build. She smiled at me right away. There was an awkward moment when I went to shake her hand and she came in for a hug. "I'm so happy to meet you," Sienna said, "and I'm thankful you're helping Professor Allenton to continue her research."
"Oh, no need to thank me. The pleasure is all mine."
She laughed with a twinkle in her eye as she stroked my forearm and squeezed my hand.
"On that note," Professor Allenton said, "Let's get started."
While Professor Allenton set up the equipment, Sienna seemed eager to help me undress. When my already hardening cock popped out of my underwear, she said, "Looks like we're ready for some science." A moment later, she rolled a contraption, covered with a black cloth, to a position in front of me. She looked at me and saw the terror in my eyes. "Oh, no need to worry," she said beaming into my eyes. "Believe me, it won't hurt."
When everything was ready, Professor Allenton said, "We can't tell you how this experiment works. It might bias the results. But I can tell you it features...drumroll...Sienna and I." Professor Allenton looked down at my cock. "Well, no need to ask if you're ready."
Professor Allenton and Sienna then stood in front of each other at the foot of the bed. Sienna was young and tall; the professor was older and stacked. Both were gorgeous. I had expected them to strip in front of me, but no, they kissed! Then they smiled at each other and kissed again. "We haven't...um...worked together like this in a while," the professor explained.
"Too long," Sienna said, pulling the professor close. A second later and they were kissing passionately and holding each other. Their breathing rate gradually increased and brought soft moans with it.
Then they parted a little, and Sienna began to take off her black leather jacket. Professor Allenton helped Sienna pull the heavy garment off as she looked up through her eyelids and smiled broadly. Sienna was smiling too and threw her hair around to expose her neck and amber earing in my direction. Sienna then ran her fingers through Professor Allenton's hair, kissed her, then reached for the top button of the professor's blouse.
All this time, my cock remained erect but now I felt the yearning sensation and the powerlessness of being tied down. It was the only part of me that could actually respond, except of course for my increased heartbeat and breathing.
Sienna stood with one ass cheek pointed out toward me. I don't think that was by accident. Sienna knew she was beautiful and knew too that I'd love seeing her exposed neck and her fine butt cheek. She helped Professor Allenton remove her white blouse to reveal a cream colored bra that stood out against her tan skin.
Professor Allenton then grasped the bottom of Sienna's sweater and pulled it over her head, careful to not snag her earing. As Sienna raised her arms to free herself from the sweater, the professor seized the opportunity to kiss one of Sienna's breasts. Sienna moaned softly, then grabbed Professor Allenton as they both knelt on the bed and then fell on it, entangled in each other's arms, kissing and nibbling. Moments later, Sienna pulled down Professor Allenton's bra and was sucking her nipples. "Aahhhh," Professor Allenton cried. "Mmmmmm...oooh, let me..."
Professor Allenton worked on Sienna's bra while Sienna went for the zipper holding the professor's skirt in place. These two beautiful women were grabbing and touching each other excitedly. Clothing came off only when it got in the way of fingers and hands and tongues and lips.
After an intense few minutes, they both rose from the bed. While Professor Allenton went to the table to do something on the laptop, Sienna came toward me and pulled the cloth from the mysterious contraption that stood about waist level. It had an arm on it with a rubbery tube at the end, a piston, and wires running here and there.
I stared, unsure what to make of it.
Professor Allenton connected the wires to the laptop while Sienna grabbed a bottle of lube and squirted it all over my dick and more into the tube.
"Oh, what...?" I said.
"It's a mechanical stroker," Professor Allenton said, as she attached some electrodes to her own body, all of which were connected to a smartwatch device on her wrist. "These wires on me will transmit signals to the watch, from there to the laptop, which controls the stroker."
"Oh," I replied, pretending I understood.
Just then, Sienna looked at me right in the eye and pushed the tube until my cock slid all the way through it. "Oooooh, mmmmm, Oh!" I cried.
"Do you like that?" Sienna asked me.
I could only moan again.
Professor Allenton and Sienna then returned to the bed. While the professor was on her back, Sienna remained on her knees and reached for Professor Allenton's cream colored panties. I could hear Sienna breathing hard with anticipation as the panties slid down the professor's legs to reveal her shaven slit. "Ooooooh," she purred, "Oh, mmmm."
"Ooooh," I said, as my heart beat faster, wishing I could go there and get involved. Sienna's skin was absolutely flawless, like an airbrushed photo. Her tight ass was pointed right at me as she bent down to begin kissing the professor's legs. I could see her pussy lips between her tight thighs. They were so beautiful! She looked back at me and smiled knowingly.
"Oh, oh!" Professor Allenton said, as Sienna kissed and nibbled her way up her legs. "Ooooooh, Ah!" Professor Allenton moaned when Sienna kissed around her pussy, then gently parted her labia and began licking her slit. "Oh!, Oh!, Mmmmm, Nnnnn, Nnnn, Ooooh!"
Just then, the piston on the stroker activated, pushing the thing up and down my stiff penis. Surprised, I cried, "Mmmmmm, oooooh. Oh, shit!"
"It's working," Sienna said to Professor Allenton."
"Mmmm, goood, OooOh! Right there!" Sienna continued licking the professor's wet vagina while rubbing her clitoral hood with her thumb. "Oh! Oooooh! Aaah, Mmmmmmm," Professor Allenton cried.
While Professor Allenton moaned and cried under Sienna's tongue, the machine stroking my cock started working harder. "Nnnnnn, ooooh, wow!" I called as I watched it work. "Oooooh, yeah, ooooh, Oh!"
Looking up, I noticed Sienna was moving her hand between Professor Allenton's legs. I couldn't see but I guessed what was about to happen. Professor Allenton suddenly yelped, "Oh! Ah! Aaaahaaa! Mmmmmm, Oooooh!" As Professor Allenton cried out, the stroker started moving faster, keeping pace with Professor Allenton's rising breath and lusty sounds. Then I realized that because the electrodes attached to Professor Allenton were controlling the stroking machine, it was almost as if Sienna was licking...me!
Just then, Sienna looked back at me, smiling. What she saw, I'm sure, was my face contorted, mouth open, eyes droopy, chest heaving, sweat running down my cheek.
"Oooooh!" Professor Allenton screamed. "Oh, OoooOooooh! OH! Ah!, Nnnnn, Hmmmm, Oooooh!" Professor Allenton's legs were shaking now and the machine was banging my cock in time with Sienna's arm. In and out, in and out.