I was super nervous. What we planned to do today was something so completely new and different that I was really excited. My Master invited a stranger to come over for a short training session. He explained to me that this would be a new part of my training as a slave. The training included some completely new aspects, such as getting involved with complete strangers, trusting in this context, and allowing yourself to be used by older or conventionally not necessarily attractive men. After all, I had to learn to let anyone use me for my Owner at any time because my body and my holes belong to him. In my last BDSM relationship, I had to have some bad experiences with such things. I now hoped even more that I would be able to replace these negative memories and associations with positive ones with the help of my Master. After all, I was his property. He could use me at any time. So, I had to learn to always be ready and to put my obedience above everything else, including possible fear, anxiety, disgust, and the like. The thought of being a mindless object makes me wet again just thinking about it. Anyway, the time had come. My Owner instructed me that we would start softly. He didn't want to throw me in at the deep end, so our guest today would only act as a spectator. I would present myself and touch myself a bit while he would use me as his live wank template. A pretty hot idea. Finally, the doorbell rang. I waited obediently in position in the living room. My outfit today was pretty standard: a lace-up corset, my over-the-knee stay-ups in a leather look, and, of course, high heels. The only special thing about my look was the fact that I wasn't wearing a mask. When he came in, I was completely surprised at how pleasant and... well, normal he looked. Not that I was expecting someone abnormal, but he was so utterly different from what I had thought. Y0ung and dressed in sporty clothes. A simple man. I liked that. He made himself comfortable on our sofa and examined the view with excitement. I knelt on a stool opposite the couch, with my butt facing our guest and my hands down on the floor. It didn't take long before my Owner gave me my first task: I was allowed to give him a blowjob while our guest watched us. He appeared to like it because he immediately took out his cock and started to jerk off. After a while, I was supposed to turn around and present myself from the front before climbing back onto the stool, facing our guest. My Master pushed his dick deep inside me from behind. I moaned. My gaze was fixed on the hard cock of the man in front of me. While my Owner was fucking me hard, I made eye contact with our guest for the first time. I looked deep into his eyes with my mouth open while I moaned more and more lustfully. His jerking movements and his breathing became faster. When Sir was finally finished with me, I was allowed to treat myself with a vibrator as a reward and to entertain our guest. I used the device in various positions and made the gentleman hornier and hornier. Eventually, he didn't want to hold back his load any longer and find his sweet release, so he jerked off faster and faster until he finally came intensely. I smiled. Task successfully completed. I hoped I had done my job well. Judging by the looks of my Master and our guest, though, there was no doubt about that...