Prude kayınvalidesi damadını sikiyor

I'm a prude religious teacher at home, grading papers. Suddenly I feel extremely aroused. I don't understand it, I never do things like this. I haven't been sexual in any way in many years, not since long before my divorce. I try to ignore the feeling and go back to grading papers. Suddenly I have an overwhelming urge to masturbate. I'm ashamed of the feeling because to me, masturbation is wrong and filthy. But the urge is much too powerful and something comes over me as I begin to indulge myself in self-pleasure. I'm so wet that it just turns me on even more. As I'm about to cum I hear my son-in-law pull into the driveway. I was expecting his arrival but not this early. It's too late to stop since I'm so very close to cumming but I know once he walks around the corner he will see me there with my legs open and exposed.