This story is based on an experience I had way back in grad school. TLDR: I gave piano lessons to a type A businesswoman/mom and ended up horizontal on the piano bench.
Steamy parts after "******"

Before I started my career, I was a part-time piano instructor at a small music studio near my graduate studies program. It was a great gig, I could essentially work whatever hours I wanted. Having been a musician for nearly my entire life, it also felt nice to scratch that creative itch that had been building up throughout my undergrad.
The studio had about 10 separate practice rooms padded with thick soundproofing foam, and each room either had a drumset, a piano, or a guitar amp depending on what instrument was being taught. Most of my students were children, which made sense considering the fact that this was the rich part of town at the edge of the suburbs, and families there could afford extracurriculars. Lessons were typically once a week between thirty minutes and an hour, and it wasn't uncommon for students to split an hour long lesson between two teachers so they could learn two instruments at a time.
One of my students did just that, and every week she would spend half an hour on the piano in my practice room before switching to guitar while her mom, Julia, waited in the lobby.

Julia was all business. Every week she would show up in a pencil skirt with a matching blazer and heels. I had always assumed she was a lawyer by the way she dressed and carried herself, but never confirmed. She was about 5'3", Asian American, and looked to be in her mid forties with the physique of a ballet dancer. Despite her buttoned-up appearance and commanding demeanor, she was always smiling and great at small talk. She'd usually chat with the instructors for a couple minutes after her daughter's lessons to get a feel for her progress. I always got the vibe that she appreciated music and wasn't just there to improve her kid's future college application, which I respected. A few months into her daughter's piano lesson Julia approached me for a lesson of her own.

"I couldn't help but overhear your lesson with [daughter's name] from the lobby. I really like the way you talk to her about music!"
"Oh thank you! At her age, keeping her interested in music is the most important thing for me. I like when my students want to learn, and getting too technical and rigid is a surefire way to push them away."
This was true. My teaching philosophy always focused on making music fun first, and sprinkling things like music theory in along the way.
"I really appreciate your patience" Julia told me, "I always wanted to learn an instrument when I was a kid, and now I think that ship has sailed haha."
"You're never too old to learn something new!" I reassured her, "Plus, adults pick up on musical concepts much faster. Some of my best students started in their adulthood."
"Really?" she paused and thought about it for a second. "Do you have any lesson slots available now?" I imagine that for her, sitting in the lobby for an hour listening to muffled drums blasting through the eggshell foam walls once a week was getting tiresome. She was probably just looking for a way to pass the time and given her type A attitude, she figured she'd pick up a new skill along the way.
"Sure, your daughter is my last student on tuesdays. We could always slot you in right after if you want!"

The following week Julia had her first piano lesson with me while her daughter was in her guitar lesson down the hall. Right off the bat I fell in love with her. She had the warmest smile and a genuine love for the arts. We didn't play all that much at first. I showed her where middle C was on the piano, explained the concept of whole steps and half steps, and talked a lot about how music works from a theoretical standpoint. After teaching children all day it was nice to speak to an adult. After 30 minutes she was playing major and minor chords, and I had her playing a basic block chord progression on the lower octaves while I improvised a melody in the upper.
"How do you do that?!" she asked, looking at me with wonder.
"Do what?"
"That. How do you just make stuff up on the spot and make it sound so good?"
"Haha. Well, the chords you are playing are all in the same key. That's one reason why they sound so good together. Since I know what key it is, I know which notes will harmonize and which notes will clash."
Her eyebrow raised and I could see a subtle look of confusion on her face.
"Don't worry, next week I'll explain what those words mean."
"Promise?"
"I promise. For now just play those chords at home and have fun. You did fantastic, you're a natural."
After a few weeks of lessons, Julia was picking up all the basics and we spent most of our lessons just playing together and chatting. She had a great sense of humor and humility, every lesson felt like a first date. Our conversations became more and more friendly and she even started cracking sexual innuendos, which wasn't too difficult when I was giving a lesson on fingering patterns and "phrasing" (thanks Archer)

A month in, Julia came to her lesson wearing her signature blazer and a low-cut, light pink blouse. Her modestly-sized, perky breasts fit her frame perfectly and I couldn't help but admire her cleavage peeking out from the thin, flowy fabric. We made our way to the practice room and sat down on the piano bench. I felt like she was sitting closer than usual. She began her warm ups and I watched her small, delicate hands tickle the keys.
"That was good, but this time try picking up your wrists some more."
She played once more and my eyes began to wander up her forearms and land upon her soft, olive-skinned chest as it gently expanded and contracted with each long breath.
"Hey! My eyes are up here!" she teased. Fuck, I got caught.
"Oh my god, I'm so sorry! I got distracted for a second!"
"That's okay. I don't mind at all." she said with a slight smirk.
"That time was better. I think." I opened her folder to a page and placed it on the music stand. "Let's try doing a few arpeggiated chord progressions."
Not long after, my eyes once again began to wander and I noticed her cracking a smile. She knew what I was doing and she didn't care. I could feel blood rushing to my pants. My underwear got tighter and tighter as my cock came to life, swelling a little bit more with each heartbeat.
"This one always confuses me." She said, pointing to the notation on the paper.
"That's a C major seven, you're almost there, just play a C major."
She pressed down on the three notes with her right hand and I reached up, placing my hand over hers.
"Now just add the B at the top with your fifth finger like this."
I finished the chord with my thumb, my large hand completely covering hers.
"Now you play." She said in a commanding voice. "I want to see you improvise some more."
I smiled at her and started noodling on the keys. By now my cock was fully erect and pitching a tent that could be seen from a mile away. The shoe was on the other foot, and I could see from the corner of my eye that now she was the one with the wandering gaze.

"*********************************************************************************"
She lowered her hands to her lap and slowly inched her right hand over to my lap. Gently, but with conviction, she placed her palm on my bulging pants and gently squeezed, getting a feel for how big I was. I took my foot off the pedal and stopped playing for a second, but she just kept moving her hand up and down the seam of my fly. She leaned in and said in a soft, sexy tone, "keep playing."
As soon as I started back up her grip became firmer and focused. I glanced down quickly and noticed her legs clenched in her form-fitting black pencil skirt. Her other hand was on her lap pressing into her crotch. At one point she couldn't fight it any longer. She unbuttoned my pants and slowly unzipped my fly. She plunged her hand in and pulled out my throbbing cock.

"Mmmh" she let out a soft, satisfied moan and started slowly stroking me. Playing the notes took my entire concentration. I closed my eyes and focused on how amazing her small fingers felt tightly wrapped around my cock. Each stroke was more confident than the last. I could feel her hand gliding along every ridge of my veiny shaft as she stroked from the base to the head.
She stopped briefly and I looked down. My precum made the whole head of my cock shiny and smooth under the florescent light and a thick drop of clear, slick precum was slowly leaking from the tip. She tapped her finger lightly on it and pulled it back, admiring the thin strand that stretched from my tip to her. She let out a light giggle and slipped her free hand down her skirt. She pulled her finger to her mouth and licked it off before reaching back down to stroke me some more.
I could see from the movement under her skirt that she was touching herself, moving her fingers up and down at the same pace as her other hand stroked me. Eventually, she freed her hand from her skirt and placed her finger on my lips. I wasted no time sucking them clean, savoring her sweet juices while trying my best to stay focused.
She leaned in and whispered in my ear, "Will you eat me?"

I wrapped my arms around her petite waist and kissed her with the kind of desire and passion that can only be achieved when its been building up for a month. I lowered her down on the piano bench and slid my hand under her bra so I could feel her soft, bare chest. I lightly pinched her nipple between my fingers and gently bit her bottom lip as I pressed myself on top of her. Then I stopped as my senses came to. "Wait, this is a bad idea" I said, "someone is going to hear us."
"No they won't. It's soundproof." She assured me, determined not to let this moment go. "Besides, the drums are right next door. We have fifteen more minutes."
I nodded and smiled, moving down to her crotch. She lifted her ass off the bench so she could hike her skirt up over her belly button. I grabbed her calves and split her legs open, revealing an absolutely stunning sight. I had always suspected she didn't wear underwear and now I can confirm. She had the cutest little pussy lips and a tiny clit to match, with a thick but trimmed patch of dark hair on top.
I started kissing her calf, working my way down to her inner thigh and stopped an inch from her pussy.
"Fuck, you're so beautiful."
My warm breath kissed her needy wet pussy. I laid my tongue flat on her slit and slowly licked from the bottom to the top, stopping at the very end so I could focus my attention on her clit. I formed my tongue into a pointed tip and flicked it across her clit, light as a feather. I could see her convulse and clench with anticipation.
I kissed her pussy and gave it another long lick, this time exploring her perfectly shaped folds. At the top, I wrapped my lips around her clit and gave it a subtle suck in and out, pulling her clit deeper in my mouth and back out like waves on the beach.
I pointed my tongue once again and pressed it against her clit with each suck. I flicked it back and forth until she wrapped her legs around my head. I held her ass firmly with both hands while letting out a low, satisfied groan which vibrated against her aching pussy. My god she tasted so good.
After a few minutes of worshipping her clit I started running my finger up and down along the entrance to her slit. I slowly guided my index finger inside her, turning it until it pressed against her g-spot. I could feel her responding to my actions. She clenched her muscles around me and I could tell what I was doing was working.
After another couple minutes her juices were running down my chin. I was eating her like she was my final meal. Her heavy breath turned to shallow panting turned to soft moans. She tried to cover her mouth which helped keep the noise down.
"Right there. Don't stop! Don't stop!" Now, I had enough experience at this point to know that "don't stop" means "keep doing exactly as you are in the exact same way." I kept the rhythm steady and the alternating licking and sucking the same. I felt her legs tighten more against my ears and begin shaking. I could tell she was cumming by the way she held her breath and her body tensed up.

I let up and kissed her inner thigh once more before coming back up to kiss her on the lips. With a couple minutes to spare she fixed her top and skirt and we finished the lesson just in time. I found out later through pillow talk that she had a busy and stressful career. For her the piano lessons were an excuse to blow off some steam and clear her head, which I was perfectly happy to help with.