Caught in the Stockroom Heatwave

I'm married but work retail and thought I was doing great at keeping things professional. Until last week when my coworker Sarah started flirting outrageously, and I just couldn't resist anymore. We snuck into the stockroom after closing one night and she pushed me up against a shelf, kissing me passionately while unbuttoning my shirt. Her hands explored every inch of my body as we stumbled to the floor mat. She was incredibly turned on, grinding her hips down on mine, her fingers deftly sliding inside me while I moaned loudly into the quiet space. My arousal spiked when she took off her pants and straddled me, riding me hard against the floor with her back arched in pleasure. It felt so wrong but oh so right at that moment. Afterward, we both pretended it never happened, but now I'm left wondering if this was just an isolated incident or a symptom of deeper issues. Is this normal to crave something illicit like that?