In the Gym Locker Room - A Matter of Consent

I've been a personal trainer at my local gym for three years now. I'm in a long-term relationship with Sarah, but we agreed to an open arrangement two months ago. It's not about lack of trust; it's more about exploring and understanding our desires. One evening after work, while getting changed in the locker room, I overheard one of my clients, Jack, complaining about his performance during our session earlier that day. He seemed frustrated with himself but also hinted at needing help. As a professional, I tried to brush it off, thinking he just wanted advice on technique or workout routines. The next day, we had another training session scheduled. During the warm-up, Jack asked me if I could help him reach his 'goals' in a different way, hinting but not outright asking for personal assistance beyond what's typically part of our professional relationship. We've never been close friends or anything outside of the gym, so this was unexpected and awkward. Feeling conflicted and unsure how to respond without overstepping boundaries, I initially turned him down politely. But after a few more sessions where he subtly brought it up again, his persistence made me reconsider my professional stance on personal relationships with clients. He was persistent and persuasive in the subtlest of ways, just enough to push the limits but not outright propositioning. One day, after I had dismissed him from our session and we were alone in the locker room changing clothes, he approached me again directly this time about his 'needs' being unfulfilled. The atmosphere was charged with a palpable tension between us. He asked if I'd ever considered doing something more than training together. Despite my personal boundaries, there was a momentary spark of interest from him that left me reeling. I ended up agreeing to meet him in a private room outside the gym hours later under the guise of 'personal coaching.' What followed was an intense and explicit encounter where we both explored each other's bodies without hesitation. The physical intimacy was raw, with no barriers between us physically or emotionally as we delved into desires long suppressed by professional roles. Jack wasn't hesitant to take charge, guiding me through a sequence of intimate acts that blurred the lines between mentorship and pleasure. Afterward, there was an immediate sense of guilt mixed with a strange satisfaction. Professionally, I knew this was unethical, but personally, it felt like something more than just casual experimentation. The next day, I confronted Jack about our actions the night before. His response was indifferent; for him, it seemed to be no different from any other fling he might have elsewhere. It left me questioning my own boundaries and ethics in this open relationship with Sarah.