My girlfriend’s college friend made me cum on her ass after the gym

One of my girlfriend’s college friends Anna (not her real name) was in town visiting for the holidays and was staying in the spare room of our apartment. Anna is probably one of the hottest women I know and incredibly fit. Like she goes to the gym everyday and goes jogging most days. She even has a pretty decent following on Instagram as a fitness model as her side hustle. Every time she pops up on my feed my cock twitches a little, since she is always in the tightest, skimpiest activewear. I’ll admit that I’ve jerked off to a few of her posts in the past before. 

It was a massive struggle keeping my eyes off of her fit, toned body when we’ve been hanging out, especially with my girlfriend around. Anna had caught me a few times staring but thankfully she has never said anything. In my defence, she usually lounges around the apartment in her brightly colored activewear, which really draws the eye. 

Anyways, one morning my girlfriend was at work and Anna invited me to work out with her. I tried not to sound too excited and agreed. What followed was one of the hardest workouts I’ve ever done, not because of the weights, but because it was such a struggle to stop myself getting hard. She was wearing this sage green set of tight shorts and a cropped sportsbra. The color looked so fucking hot with her tanned skin.

All the guys in the gym were staring as she asked me to spot her doing squats. I couldn’t stop myself from getting hard being so close to her juicy ass and at one point she grazed my rock hard cock as she squatted down. Embarrassed, I apologised but she played it off like it was no big deal.

As soon as we got back to the apartment I excused myself and rushed to the shower since I was so pent up and could barely keep my hard on suppressed. I opened up her profile on Instagram and immediately started jerking off. About a minute in the door opened and Anna walked in. I was speechless as there wasn’t anything I could say with my rock hard cock in my hand and photos from her Instagram clearly visible on my phone. 

She didn’t say anything either, she just closed the door behind her and gently placed a hand on my chest and pushed me so that my back was up against the wall. I had already undressed for my shower, but she was still in her activewear. She turned around slowly and pressed her ass firmly against my cock. I don’t think I’ve ever been more erect in my life, it felt like my cock was going to explode at any second from her touch. Then she started grinding. 

I let out a low groan as she started stroking my cock up and down with her ass cheeks. The sensation of her firm ass with the smooth material of her shorts rubbing against my cock almost sent me over the edge. I started breathing quite heavily, trying my hardest not to cum immediately. She was still hot and sweaty from the gym and I could see her toned back glistening in the light. I desperately wanted to kiss the back of her neck, and grab one of her breasts but my body was just frozen in shock and trying not to cum. 

I was getting so close, so much precum had oozed out of my cock and was soaking into her shorts. I noticed that her eyes were locked into my reactions in the mirror. She had a devilish smile and I could tell that this was a such a massive turn on for her, getting me so worked up and close to cumming without even needing to be naked, using just her ass. We both knew she held all the power in this situation. My hands were white knuckled gripping onto the towel rail as I couldn’t handle it any longer and my cock finally shot out ropes and ropes of cum all up her back and onto her shorts. 

Wordlessly, she undid her bra and slid out of her cum stained shorts. She handed them to me and told me that they needed a wash. I barely got a glimpse of her perky breasts and naked pussy as she hopped into the shower. 

I chucked them straight into the wash and hopped in the shower after she was done. We never spoke about the interaction and carried on as if nothing had ever happened.