Attractive girl and her cuckold BF

That day in a gym, I saw a couple while I was sweating on treadmill. I heard the guy was giving stupid and even dangerous advices about exercising style, so I just couldn't stay quiet. I came closer and showed her few tricks and during that conversation my cash fell out from my pocket. I wasn't planning to hunt that day, but I saw how magnetic those banknotes were for the girl. Do you want all this money? - I've asked them. And added what I want for that. I've never had intimacy in gym before and it was awesome! I pounded her hard there and I enjoyed this experience a lot since I could see my reflections in gym mirrors. I covered her twice with my spunk and wanted more, but...