OK, I need some opinions here. My buddy and I both took up tennis about a year ago. Really love it. We decided to take lessons together a few months ago. Pretty sporadic, maybe one lesson a month at most. All of a sudden he starts getting a lot better than me, I'm thinking what's going on here, then I find out from my wife she saw him at the club taking private lessons! And he never told me! Is this low or what? Should I immediately sever all ties with this phony or what? Comments please. . .