You are in a position of power and trust, if you abuse that your name will be mud and that will stay with you forever so do not even go there. It is simply a crush and you must have some inadequacies in your life to even contemplating acting on this crush. Are you having a good sex life, try and work on your relationship with your wife. This girl is nothing more than a tease and you will regret doing anything to her. I get flirted upon by single mothers, young teenagers some times and never respond, your reputation is the most important thing you have. DO NOT FUCK THAT UP EVER!