Tutoring After School Gets Interesting

I'm an English teacher, but today I decided to spice things up a bit with one of my students who's struggled in class lately. We stayed back after school for extra tutoring and got into some playful banter. Before long we ended up kissing in the supply closet, there was definitely chemistry between us. I know it’s totally taboo and I’d probably get fired if anyone found out, but honestly I’m not sure if I can regret this. Am I just a bad person? Is my curiosity justified or am I being too risky here? What would you do?