Tonight's Shocking Secret

I'm usually good with keeping secrets, but tonight feels different. I've been in a committed relationship for years now, and everything is great between us, until last night. In the back room of my bar, a regular customer approached me, someone who has flirted before but never gone beyond that. We ended up locking ourselves in a supply closet, his hands all over me as he pulled me close. The heat, the way he whispered naughty things and touched me where only one other person had ever been, it overwhelmed my senses and any self-control I had left. He was relentless, and despite everything I felt for my partner at home, there was no stopping us once we started. His hands moved under my shirt, exploring every inch of skin he could reach. Then came the moment when he found his release deep inside me, a raw, intense experience that shook something in me to its core. I'm torn up about it now. How do I face my partner tomorrow? Do they deserve to know? Will it ruin everything we've built together? Tonight's confession feels like a betrayal, but is it one worth keeping secret? What would you do?