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This happened about 2 weeks ago with my gf at the gym. We have recently joined a new gym near where we live, it’s a small gym and probably has about 50 people that go. My gf is 24, brunette, small and has an amazing figure. She wears tight gym leggings and her ass looks amazing in them. The first day we went to the gym together I noticed a few of the guys working out, staring at my gf’s ass (hard not to really). One guy in particular seemed to like what he saw and decided to go and workout close to my gf, she was working on legs and he decided to do the same and use the machines next to her. I was on the other side of the gym and could see him staring at her ass at every opportunity he got. He looked older than us probably mid 30’s, was muscly and about 6ft tall. I enjoyed him finding my gf hot and knew she wouldn’t do anything with him.

Fast forward a couple of days later, me and my gf went back to the gym and the same guy was there. Again his eyes turned straight to my gf, we were working out together this time and he decided to come over and introduce himself. His name was Paul and he began to make small talk with us. I went to workout at a different area of the gym and left him with my gf, where they continued chatting. They were laughing and I could tell he was flirting with her. At one point he even brushed her ass with his hand, which seemed to shock my gf. The second we got home my gf took me straight upstairs and we ended up fucking, I could tell this interaction with Paul had got her worked up.

We had gone to the gym a few more times after that without seeing Paul, but then a few weeks ago we saw him again. He came and chatted to us and asked if we had used the sauna at the gym yet. We hadn’t used it yet but we’re planning on it after the workout. Paul asked if he could join us after as he gets bored on his own and we were fine with that. It had got to the end of the workout and we all headed to the sauna together, it was empty like all the time. My gf had put her bikini on which showed off her big tits and amazing ass which definitely got Paul’s attention. Paul was in his towel and I had my boxers on. We had been in 10’minutes before I decided I needed a break and to get some water. I positioned myself out of sight but where I could see into the sauna, Paul moved closer to my gf and began massaging her shoulders, I could tell she was enjoying this. She then placed her hands on his chest and began rubbing before they both moved in and began kissing. I was shocked but at the same time enjoyed what I was seeing. Paul removed his towel to reveal a big erect cock, my gf again looked stunned and placed her hand on his cock. She began jerking him off and he was rubbing her ass. After a couple of minutes I walked back over to the sauna where they had parted quickly and both looked nervous.

My gf still doesn’t know I caught her but wonder how far this could go next time.

NSFW: yes

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