I took a simple twelve inch shatterproof plastic ruler. It would sting, and redden, but not damage. I took up a position behind the captive form, to o...e side, my own torso pointed across the bench and its occupant.I waited, making a few practice swings with the ruler, letting her anticipation grow. She couldn't have seen what I would use, she couldn't know in advance how much it would hurt. Only that it would hurt.'Crack!'She stiffened at the blow. I drew back my arm to see the result, and to. I wanted to do it. I so badly wanted to do it.I couldn't.I got off the bed and silently dressed. A lone tear ran down my face.I undid the cuffs."Close your eyes and keep them closed," I whispered. "Okay?"Michelle nodded.I took off the sleep mask. I put everything in my backpack and I vanished.I walked home conflicted. I wanted to fuck Michelle. I so wanted to do her but when it came right down to it I couldn't. I knew I would enjoy it. It was sex. It would be good but I couldn't just fuck her. "Jenny and I exchanged a nervous look as Mary got Brian's contactinformation and said that she would be in touch with him later thisafternoon. Before Jenny or I could say something, the caterer enteredthe Dining Room and the discussion was quickly changed to the meal thatwas going to be served. An hour and a half later, after finalizing thehors d'oeuvres and tasting the final entrees, Jenny and I were able toexcuse ourselves to make the drive over to the airport to pick up ourfriends. I kept. While I rubbed her clit she managed to lower her blue jeans and her panties to her ankles allowing her to open her knees up wide. That gave me even better access to her sensitive clit. She said, “My clit is getting sore. Put your finger in my hole and to get it wet. The lubricant helps when I do it too much.” I had never thought about my sister jerking off even though I had been doing it for years myself.I slipped my index finger into her hole and found a whole new thing to play with but I went.