Caught in My Desires

I'm a high school teacher, married for five years now. Lately, I've been drawn to my student, Alex, who's in her twenties and incredibly alluring. Last week, we found ourselves alone in the supply closet after class. It was a moment of weakness, I couldn't resist anymore. Our bodies pressed together, hissing breath mingling as our lips met fiercely. His hands slipped under my skirt, fingers seeking out my hot center. I arched into him, moaning loudly against his mouth as he slid two slick digits inside me. The pressure built rapidly, my muscles clenching tightly around him as pleasure surged through every part of me. Now I'm terrified, what if someone heard? Should I tell my spouse? Is this just a fleeting thing or is it something more dangerous?