This is the story about the first time i ever saw my girlfriend with another guy. She is a dark haired sexy latino from Argentina. He is a mate of hers, who she had admitted she fancied but i never thought anything would come of it. I don't blame her now cause he is very hot too! Then one summer he volunteered to teach her driving and everything changed. I once came home from work early and realised she'd taken the car for her lesson. Waited around for a while and then noticed them drive in and park at the back of the flats at the far end of the car park. Kept waiting for them to come out but they kept sitting in the car. So I went down to check on them. As I walked to the car, my heart was pounding as if i already knew what to expect. When I got close to the car parked next to them, I could hear her signature moaning sounds that she makes just before she's about to cum. I hid behind the car next to them and took a peak through the passenger window. I could see her in the drivers seat of my car, with one of her gorgeous tits out and him licking her neck. I could also make out that he was fingering her (expertly!). I'm sure she came at least twice in a span of 15 mins. Watching them I initially felt a bit shocked, then jealous and then extremely HORNY! Really wanted to wank there and then but it was in the middle of the day, in the middle of a car park that any one could walk into at any time! So I just watched with my trousers sticking out painfully. Anyways, after she came the second time, it was as if a demon had all of a sudden possessed her. She pushed him back into the passengers seat. Started kissing him like a maniac and ripped his shirt open. Then she kissed him all the way down his chest. Unfortunately, from where I was standing I could only see above a certain level but the exstatic look on his face told the whole story. Every now and then however, I would get a glimpse of her head bobbing up and down. After quite a long session of this she sprung up, pushed his seat back, got out of the drivers seat and jumped on top of his lap. She rode him like a stallion with her gorgeous boobs bouncing in his face. She rode him for ages and probably came at least twice before he did. Finally, when it was over I made a dash back to the flat. She came in about 10 mins later. Looking as if nothing had happened. Pretending to be all innocent and asking why I was back early from work. She then tried to make a dash for the shower but I got up and kissed her. Immediately smelled and tasted him on her. Somehow that turned me on even more and she was obviously still quite horny from the session and she practically jumped me! We did it right there in the lounge. I licked and kissed her all over. Tasting him on all over her stunning body. We then 69ed on the floor. I think she then knew that I knew but we didn't talk about it but we were both so horny that we quietly fucked for ages. After it was all done, we finally did get to the shower together and she told me everything and I told her that I'd seen it all and that it had turned me on to no end. I also told her that I would love to have a threesome with her new fuck buddy and she agreed to make it happen. Which it did and it was equally marvelous but thats another story for part two!