Marina and I got to the classroom just on time. We took a couple chairs and sat at the end of the room, the only two people in the back raw of long tables.

The teacher, as grumpy as he was, started to rant about younger generations and talked, once again, about his professional achievements.

—I can't believe this fucker —Marina said in a low voice—. Again with this? We already know everything about his 3rd place in the photo contest five years ago.

I just laughed and tried not to fall asleep as the teacher went on and on. I rest my hands on my thighs and felt Marina's knee touching mine. I discreetly took a peek to her legs, she was wearing black tights, so stretched by her long pale white legs it seemed they could have ripped at anytime. I turned my head completely to admire her black dress printed with horror movies monsters, she was a fan of old horror films. I stopped at her breasts, I couldn't get enough of those big round milk white breasts of her. She looked at me and smiled, I smiled back and we returned our attention to the front of the class.

Out of boredom, she started dancing on her seat, her knee kept hitting mine over and over. I placed my hand on her knee, she let out a sigh and stopped.

I started caressing her knee, as I usually did. I knew she liked that, I noticed how she immediately smiled and softly purred. The professor's head was still way up his own ass, the rest of the class was minding their own business.

I started caressing Marina's knee with very specific finger motions, her lovely innocent smile faded and she opened wide her honey eyes, I could tell she recognized immediately those motions.

I started making circles on her knee with my index and middle finger, gently, slowly. She got visibly nervous as her cheeks painted red.

—What are you doing? —she asked in a low, trembling voice.

—You know —I answered without looking at her.

I could hear her breathing heavily and slowly, I played my fingers on her knee the way I knew she loved it, I could notice her skin getting goosebumps and her nipples getting hard under her dress.

—Wow —I whispered to hear ear—, you're really liking this, don't you?

She hold my hand still with hers as the professor started walking around the room. She kept looking down to the table hoping the professor won't notice her red face. I just sat straight and pretended to pay attention. The professor got back to the desk in front of the room and kept talking about him and his greatness.

Marina let my hand go. I rested my hand at her knee for a moment and moved it slowly upwards her big, soft thigh, just a little.

—Yes —she whispered trying to hide a nervous smile.

I went up her thigh, slowly, feeling every inch of her tights, enjoying how she trembled a little while my hand was getting closer and closer in such a public place.

She let out a soft sigh as my hand finally reached in between her legs. Under her dress, undercover of the table, I could feel her wetness through her panties and her tights.

She bit her lip as my fingers repeated the motions they did on her knee. Her breathing got heavy, her hand held my arm strongly, her nipples got even harder making two cute little bumps on her dress.

Her face was completely red, she took deep breaths trying to remain calm, but from her waist down I could feel the warmth, the wetness, the desire running through her whole body.

I pressed a little harder with my fingers, she held tighter my arm and lowered her face trying not to make a sound.

I scanned the room, no one seemed to have noticed us, specially the professor.

I got my hand deeper and started to push her clothes into her entrance, the warmth and wetness was delicious, Marina's breathing was getting heavier and heavier, my manhood got so stiff there was no way I could have hidden it.

As Marina's eyes rolled back and her hand clawed into my arm, I knew it was time for her to cum. I kept moving my fingers under her dress until she laid her head on the desk, her nails almost pierced through my arm and her whole body trembled. I could feel her insides tightening around the tip if my fingers, her panties and tights got soaked as so did my fingers, she moaned in whispers and, finally, she collapsed over me.

Once she let my arm go, sat straight and recovered her breath, we looked around.

—Did no one notice for real? —she asked me.

—It seems so —I answered as I lift her hand to kiss it—. We were lucky.

—Fuck... That was intense.

—I noticed.

The bell rang, the professor dismissed the class and she tried to stand up.

—Shit, my legs are weak.

I laughed, she got mad.

—Shut the fuck up and walk me to the restroom, I need to clean up.

I offered her my hand and she took it to her mouth, sucked my fingers and smiled.

—Cannot wait for next week's class.

We smiled and walked out the room.