I sat there, stunned by my own actions. I held my phone in my hand, the call with Madison still active, watching the call timer continuing to tick up. Instead of ending the call, I had gently bumped the phone on the car counsel while simultaneously hitting the ‘MUTE’ button, this gave a sound that was a good substitute for an authentic hang up, making it seem like the call had ended. At least if the person on the other end wasn’t paying too close attention...

“I’m just being silly. It has been too long, letting my fantasies get the best of me” I thought to myself. But at the same time, I knew that I had already taken steps to act on this fantasy. Well before my fake hang up, I had pulled off the highway onto a secluded exit and parked on the side of an empty road. My car covered in deep late-night darkness.

Private. Alone. The perfect opportunity to act on impulses long suppressed. Impulses that didn’t want to wait anymore.

I strained to listen, the noise from the other end coming in crisply as I turned my volume up to max. I heard the sound of footsteps coming closer to the phone:  Madison returning from the kitchen, most likely. Immediately after I heard Jeff react in surprise

[What…?] his shocked and confused voice started, but Madison cut him off, confirming that I had hung up. My stomach twisted into knots wondering what I would do if my ruse was discovered. I could play ignorant. I’m still in my early 30s, but to these two I am ancient. Playing dumb about technology is always an easy escape in such situations.

I released a nervous breath I didn’t know I was holding when I heard Jeff’s voice respond [Yes, she said she would call back in 30-45 min. What's going on?]

“I know what's going on” I thought to myself with a smirk. My entire soul oozed with jealousy of the situation Jeff was in. What I wouldn’t give to have someone like Madison coming after ME!  A sexual partner that wanted to fuck. A partner that was skilled and enthusiastic and adventurous. The opposite of the pathetic lover I have been with for years.

I could feel the warmth in my face just from imagining such a situation. If Madison is even half as sexual in reality as she pretends to be, she might fuck Jeff’s cock in half.

“Oh my god, am I really doing this?” A small voice in the back of my head said. “This is wrong. They are part of your research program. They are students! You are spying on them!!” The voice protested.

But the rest of my brain, the part that would maybe have listened, had already made up its mind. Long before I consciously realized, I had started to set this in motion. I laid the phone down on the seat next to me, and started to gently rub my nipple with one hand. Closing my eyes as I thought of the two young co-eds in a college apartment about to fuck each other’s brains out.

Sounds of making out came through the phone. Their almost reckless desire was palpable. Though such an experience was years behind me, the sound coming from the phone transported me back to those memories. The sounds of breathing, hands moving across skin, the shifting of hips, and the interlocking of tongues and lips was something I could never forget. I could feel my nipple hardening under my bra as I got more turned on by the sounds of the action I missed so much from my youth. Rubbing my hands down my hips and inner thighs, feeling the warmth of my own touch through the dress pants I was wearing. I was still alone, doing this all myself, but the background audio made things feel more authentic, and my body responded.

<slap>

The instantly recognizable sound of Jeff slapping Madison’s ass, followed by a soft moan from Madison. It all came through so clearly it was like I was there seeing it. I could see Jeff’s hands, relatively large for his size, slapping and gripping Madison’s gorgeous ass cheek, spreading it slightly just the way I like it. Madison responding by grinding her hips deeper into Jeff’s crotch.

“God to feel that hand on my ass” I thought to myself, my lust and desire fully out of control now. Still playing with my nipples through my shirt, I felt myself more and more. Imagining Jeff’s hands feeling my plump breasts. Jeff’s hands running down my thighs. Jeff’s hands squeezing my hips and grinding me on his hard cock, begging to escape from his pants.

As I squirmed in my car seat, feeling a rush of warmth from my genitals, I heard the sound of Jeff’s pants coming off. Without thought I instinctively did the same, unbuttoning my suit pants and pulling them down to my ankles. I spread my legs and opened my hips, and immediately started rubbing myself through my cotton panties. The soft pressure and teasing of my lips sent a shiver up my body. I was more turned on than I had been in a decade. Slowly running my hand down my entire vag – feeling the warmth from my hand through the thin layer of cloth separating me – felt electric.

I made a soft whimpering sound in response to a wave of warmth washing over me. Using my free hand, I unbuttoned my blouse to open my shirt, grabbing my tit like a man would, letting the fantasy of being with Jeff take hold. Trying my best to picture his cock from the test barely 18 hours ago, but it was lost in an ocean of other penises I had seen in the sterile test environment.

[Holy shit, you have a massive cock. How big is this thing?!] I heard Madison almost yell over the phone. My eyes snapped open in surprise. Now I could picture Jeff’s triumphant penis. Massive and with the girth to spread my pussy in a way I always loved. The mental image of his gorgeous cock filling me had my breath quickening.

I listened to the two of them talk, mutually reveling over the “discovery” of how big his penis truly was. Too lost in my own hedonistic pleasure seeking to appreciate what Madison said – this medicine was going to make so much money. I could feel my panties starting to dampen, as the heat from my vag grew more significant. Using two fingers, I ran down the sides of my lips, pushing them together to indirectly stimulate my clit. The tease of doing so driving me wild, sending a shiver up my spine to my scalp.

[I hope you’ve got skills] was the last words I heard spoken, before the sound of a hard cock sliding into a wet pussy transported me again like I was in the room myself. Any awkward fumbling that might have been between two new lovers at the start was long gone. They now sounded in complete unison. In perfect synch. I could hear the soft rustle as Jeff ripped Madison’s shirt off, and their shared moans as he dove into her gigantic tits.

With my eyes closed, listening to the rhythmic humping of Madison, I started to match my own stimulation to their pace. Pulling my panties to the side, I dove into my aching pussy, desperate for the attention it never gets. Using my index and middle finger, I made love to my clit in a way my husband hasn’t in over 10 years.

Listening to the sounds of the two students fucking, with my eyes closed, I imagined I was there with them. My own arousal growing as theirs did. As I got more and more wet, more and more turned on, my body began to crave more. I needed both hands desperately.

As quick as I could, I stopped and ripped off my underwear, fully removing my pants at the same time. I then leaned the car’s chair back and put one foot up onto the center console – careful to not even bump the phone. The phone that was piping in the critical stimulation I needed to continue my lustful masturbation.

While one hand was circling my clit and playing with my lips, I used the other hand to feel up my tits. “God I have great tits. Any man would kill to have these tits in their face.” I thought, fully feeling myself up in approval of my own raw sexual desirability. I ran the hand down my thigh, feeling my toned legs as I traced closer to my vag. My spread position now opening my beautiful cunt, as if begging for penetration from a worthy man.

Suddenly, there was a pronounced pause in the delicious sounds of sex coming from my phone. Only for a heartbeat, and then it started again, but now reinvigorated. Madison had adjusted position, and was now fucking Jeff like never before, clearly on a quest to empty his balls. A quest I imagined being a part of, in my own voyeuristic way.

The moment the sound returned, I moved my hand from my thigh and inserted two fingers into my pussy. The pleasure was instant, and far more intense than I had expected. A guttural moan left my mouth, and I felt liberated and righteous from its expression. Madison and Jeff were going at break neck speed, and it took me a few moments to catch up as I started to play more directly with my clit, as my fingers sunk fully into my pussy and I started stimulating my G-spot.

With one hand I rubbed my clit, feeling the sensitivity build as my orgasm approached, and with the other hand I did my best to fuck myself while thinking of Jeff’s monster cock deep inside of Madison. I could hear from their moans and the wet slop of their fucking that they must be getting close. An almost panic tempo of Madison’s humping signaled that they were both sprinting to the finish, her desire for release over riding all other instincts. A radiating wave of pleasure started to build in me, starting from my genitals and traveling outwards up my body and down my limbs. I knew this was the start of an orgasm I hadn’t had in nearly a decade, something my pussy has been craving for just as long.

Finally, at nearly the same time I heard the sounds of climax from my voyeuristic “partners”, I reached the point of no return. Involuntarily I held my breath and quickened the speed by which I was simulating Jeff’s cock fucking me, removing stimulation from my clit altogether as my pussy started to throb and pulse. The desire of the moment rising and rising until – all at once – a sudden release. A massive explosion of pleasure crashed onto me, making my body convulse, as the sound around me turned off. I couldn’t hear anything but my heartbeat as the power of the orgasm enveloped me.

After what felt like only a moment, but was likely a couple minutes, I regained clear thinking and surveyed what had happened. What I had done. My hand was gently rubbing above my clit, keeping the warm tingly sensation all over my body going a little longer. A huge grin split my face, and no matter how much I thought about the boundaries I had just crossed by listening to the sounds of 2 students have hot, dirty sex, I couldn’t feel anything but overwhelming joy.

The joy of doing something dirty. Something adventurous. The joy of hearing authentic, enthusiastic sex. The joy of doing something for myself, instead of always being a second thought. The joy of being reckless for a change.

As I pulled my underwear and pants back on, my happiness was still in full bloom. I could hear the students already starting to flirt and – clearly – getting ready for round 2. I waited for an especially loud moment to prevent them from noticing the authentic hang up sound. It didn’t take long until Jeff threw Madison to the couch to take charge for their second round and I finally ended the call.

I pulled back onto the highway and rolled the window down, letting the cool night air wash across my face and blow my hair behind me. Reveling in the thick smell of pussy that hung in the car, even with the window down, I continued to grin.

“It was still just myself. There was no big cock and sex hungry man with me.” I said to myself, turning up the radio as 'Sweet Thang' came on, blasting it to match the energy coursing through me.

“But maybe not for much longer.” I said, giggling like a young foolish college kid.