Several times, at the risk of incurring a penalty for speaking without permission, I begged to be allowed to come. At first, Sir just grinned and refused, but eventually he silenced me by saying, "No, the whole point of the exercise is for her to bring you off at exactly the right moment. I'll tell her when the time's coming, but only a few seconds before, so she has to keep you excited and ready to come very quickly, but at the same time be careful not to let you come too soon. She's very clever, isn't she?"

There was no doubt at all of that! Danielle left no part of my spreadeagled body untouched by her fingers or lips or tongue, from my fingertips even to the soles of my feet, and before long it seemed that every nerve ending on my naked skin was sending sensations of sheer pleasure to my brain. Her hands and mouth returned often to my prick and balls; the former stayed rock-hard or nearly so for the whole time, but she sensed with amazing accuracy when I was close to the point of no return and then either avoided it for a while or eased my arousal by squeezing its head firmly.

Lost in a sea of erotic sensations, I was barely aware of my surroundings when suddenly Sir said, "One minute to go, slave-girl!" Instantly, Danielle was on her knees and the head of my cock was in her mouth and being tongued with great skill; but her hands continued to roam over my body, and I vividly remember her fingernails scratching firmly down my chest and sides, along the taut muscles of my wide-spread legs and finally up the exquisitely sensitive tendons of my inner thighs. By now, I couldn't have stopped myself coming to save my life, yet Danielle's mouth and hands seemed able to coax me along exactly as she wished.

My cock was deep inside her mouth and her fingers were playing a rapid tattoo around its base and my balls and crotch, when I heard Sir's sharp "Now!" -- dimly, because at that precise moment Danielle seemed to touch a trigger that sent me into one of the most mind-blowing orgasms I've ever had. In spite of the bondage that held me almost immovable, I could feel my hips jerking as my prick spurted its juices deep into Danielle's throat. I think I actually passed out with the intensity of pleasure that seemed to last for hours.