A Night of Betrayal and Desire

I've been engaged to my partner for over a year now. We were best friends since college, and we built our relationship on honesty and trust. Over the past few months, I found myself increasingly attracted to someone else at work, a married woman named Sarah. She's in her late twenties, while I'm thirty-two. I kept telling myself it was just a crush and nothing would ever come of it. But then one night after work drinks with colleagues turned into something unexpected. We ended up back at the office for more drinks and I found myself getting closer to Sarah than ever before, touching her arm, laughing with her, and feeling my heart race every time she was near. She seemed to feel the same way. By the end of the night, we were alone in the empty office. The air between us crackled with unspoken desire. I knew what I had to do, but it felt like an impossible decision. My partner trusted me completely and this would surely destroy everything we've built together. But then Sarah leaned in close, her breath warm against my ear as she whispered that she wanted me just as much. It happened so quickly after that. We kissed passionately right there on the cold office floor while I was still wearing my work suit. She unzipped my skirt with trembling hands and guided my legs apart for her fingers to explore me thoroughly, all while I arched into her touch in desperate need of release. It wasn't until we both were panting heavily that I realized what had happened, I'd betrayed my fiancé, the love of my life, all because I couldn't resist temptation. We lay there on the cold tiles, catching our breath and staring at each other in shock. What had started as a moment of weakness quickly became something more, a mutual acknowledgment of feelings that we both knew were wrong but couldn't deny. Sarah's fingers moved deftly inside me while I pushed myself against her hand, desperate for the friction that was already building to an impossible peak. I finally came hard against her fingers with a moan that echoed through the empty office, feeling her move away and zip up my skirt as if nothing had happened. We both knew we couldn't let this continue or it would destroy everything good in our lives. But even now, weeks later, I can still feel the shame and guilt every time I think about how far a moment of weakness could take me.