My Girlfriend's Study Buddy Made Me Cum On Her Ass After Working Out

My girlfriend’s college friend, Anna (not her real name), was visiting for the holidays and staying in the guest bedroom of our apartment. Anna is without a doubt one of the most attractive women I know—fit, muscular, and incredibly beautiful. She goes to the gym every day and jogs frequently. She’s also a fitness model with a decent Instagram following, where she’s always seen in tight, revealing workout clothes. I have to admit, I’ve jerked off to her photos a few times.

It was nearly impossible to keep my eyes off her when she was around, especially with my girlfriend nearby. Anna has caught me staring a few times, but thankfully she’s never said anything about it. To be fair, she doesn’t make it easy for me either—she often wears brightly colored workout clothes that perfectly accentuate her curves.

One morning, while my girlfriend was at work, Anna asked me to go to the gym with her. I tried to hide my excitement and agreed. The workout was tough—not because of the weights, but because I was constantly fighting my erection. She was wearing a tight green outfit of shorts and a sports bra, and it looked amazing on her tanned skin.

At the gym, all the guys were peeping as she asked me to spot her doing squats. It was nearly impossible not to get hard so close to her round, firm ass. At one point, she accidentally touched my erection while squatting. Embarrassed, I apologized, but she smiled and acted like it was nothing.

When we got back to the apartment, I went straight to the shower. I was so turned on that I could barely contain myself. Once in the bathroom, I opened Anna's Instagram profile and started jerking off. Not even a minute later, the door opened, and there she was.

I was frozen in fear. There was no denying what I was doing, with my hard cock in my hand and her pictures on my phone. Anna said nothing. She closed the door, put her hand on my chest and gently pushed me against the wall.

I was naked, but she was still in her workout clothes. She slowly turned around and pressed her firm ass against my erection. I thought I would explode right away. Then she started moving.

The feeling of her muscular ass rubbing against my cock through the smooth fabric of her shorts was almost too much. I was breathing heavily as I tried to hold on just a little longer. She was still hot and sweaty from the gym, and the sheen of her back in the light only made me harder.

Her eyes were locked on mine through the mirror, a devilish smile on her face. She was clearly enjoying turning me on like this, knowing she was in complete control. My hands gripped the towel rail tightly as my body gave out. With a low groan, I came hard, shooting rope after rope of cum down her back and onto her shorts.

Without a word, she removed her sports bra and slid out of her cum-stained shorts. She handed them to me and said, “These need to be washed.” I got a glimpse of her firm breasts and smooth pussy before she stepped into the shower.

I threw her clothes in the wash and waited for her to finish her shower before I went myself. We never spoke of it again, and life went on as if nothing had happened.