... It Wasn't Meant to Happen ...

I've been married for five years now with my wife, Sarah. We have a great relationship and we both respect each other's boundaries. She trusts me completely as well, or so I thought. A few weeks ago, while doing sessions at the gym where I work, one of my clients caught my attention... specifically her toned body and piercing blue eyes that seemed to follow me around everywhere in the gym. Her name was Lisa; she's in her early thirties, with a fit build that showcased every muscle definition during our training sessions together. Our conversations were always professional at first, but as weeks went by, I found myself looking forward to seeing her more and more... I convinced myself it was just about admiring someone who was dedicated and put effort into their fitness goals. However... One day, after a particularly exhausting workout session, Lisa invited me out for a drink to thank me for my help with reaching certain milestones in her training program. We talked long into the night over beers... eventually, we were sharing personal stories and laughing like old friends would do. It started innocently enough, but as time passed... I found myself leaning closer towards her and before I knew it, our lips were meeting in a kiss that neither of us could pull away from. It was electric; passionate even though it went against everything I stood for... Our hands roamed each other's bodies without any more questions or hesitation... eventually making their way to the bed at her place where we continued what had started with an innocent drink... The way she whispered my name as we moved together was like nothing I've ever experienced before... We spent hours exploring each other, our bodies slick and warm under the sheets. Each touch felt electric; her lips traced over every inch of me, making me shiver with need. The morning came too soon, bringing back reality... but there were no regrets or shame, just a deep sense of guilt for crossing this line. I know it's wrong... I don't know what the future holds and whether I'll ever see Lisa again outside our training sessions... This is something Sarah has absolutely no idea about... She doesn't need to know. And now, here I am, trying to figure out if I'm the asshole for doing this behind my wife's back, it wasn't supposed to happen like that at all....