I wiggled around, twitched my hips and clenched my cunt on his dick. I heard him gasping and grunting as I moved up and down on his cock. Finally, I...lowered myself all the way down and ground my pelvis, feeling his cock pushing into me as deep as it could go. He was close to cumming, and as he started to grunt louder I stood up, took the knife and plunged it into his cock. He froze, staring at me, his mouth open wide, his eyes uncomprending as the blood flowed to the floor from the huge. One word about this to anyone and all communication ends. Got it?”She shrugged, “Sure. I figured that out on my own.”“By the way, how old are you?”“I’m a senior in high school. I’m seventeen.” And she smiled. “That makes me legal if that’s what you’re wondering.”“It was, yes. We’ll also want a photocopy of your driver’s license or similar government document that proves your age with your note. Got it?”She straightened up, made a stern face, and snapped off a salute, “Yes, sir!” Then she. I followed him and we talked about my lifestyle and some of the fun things I had done. I was curious about him and his girlfriend and was about to ask when we came to a door. He said, “This may shock you,” and he opened the door. When he turned on the lights I was indeed a bit shocked. It was straight out of 50 Shades of Grey. We went in and it was then that he told me that his girlfriend was not just his life mate but also his submissive. I told him I was a sub, too, but not really an S and M. There weren't that many seats, probably no more than 50, but the area was brightly decorated. Unlike Central Park in New York, we never had much to worry about vandals or street thugs in this part of the city, or at least not as much. I assumed all the lighting was meant to give customers a sense of security as well as to attract people who didn't know about the event.We arrived there rather early. There were plenty more seats available, so we picked the one at the front. Easier to see the tree.