As I entered the living room, Karen was lying on the sofa, face down. “Are you o. k.,” I asked? “Yes, my back hurts though.”“Karen, don’...t take this the wrong way, but I will be glad to massage your back if you wish.”She smiled and said “Dr. Giordano, that would be great.” Then I told her to call me Dick as long as we were not in the classroom. “O.k., Dick” she said.I sat down on the floor in front of Karen and began to massage her back. I moved my hands up and down from her hips to midway. The woman in front of me was probably 140 lbs, 5’9”, nice breasts ( not too big and not too small), flat stomach and a beautiful ass. The instructor got class started with some stretching and I could not keep my eyes off the ass of the woman in front of me. She wore navy blue spandex tights and a sweatshirt. Everyone then spread their feet wide and bent at the waist to touch the floor. In this position, I could see an outline that was definitely not a vagina and so I stared more intently and. I wanted him so much it scared me sometimes ... like right now. But I had to play along like he didn't affect me this way."Promises, promises ... you got me here, now what are you going to do with me?"He just looked at me, his expression unreadable before striding over to grab hold of my shoulders."You know what happens to girls that tease men..." What... ?"He kissed me hard, almost brutally. His mouth seizing my lips and his tongue in check ... as my lips parted so as not to get bruised. Right. He asks how long I have been watching and I admit for more than a few minutes. “You know I am mesmerized by you baby.” In one swift move he pulls me around the chair and face down into his lap. He pushes me slightly forward so my ass is in his lap. “You have been a naughty girl, standing by and watching when you should have been here helping. You know what happens to bad girls”. My body starts to tense, I know it's only a matter of seconds before his hand strikes my ass. Crack! “Oh.