Watching Girlfriend With Another Man

I've been dating this girl for about six months now and I've recently told her that I fantasize about watching her have sex with white men (we're both Asian) as I wanked off. At first she was a little freaked out about the idea, but she really loves me and eventually started warming up to the idea. We finally did it and here is the story: One day we were at a restaurant waiting to be seated and I decided to go to the restroom while she waited. When I got back there was this white guy talking to her. When I joined them I noticed he was also checking her out and flirting a bit and this got my dick hard. My girlfriend put her arm around me when I got back and then he looked at us a bit then kinda left and rejoined his friends. I mentioned to her that this could be the guy that we could do it with but she was totally apprehensive. After begging real hard she reluctantly decided to go through with it. So then, all throughout the night I kept an eye on this guy. Finally he got up to use the restroom and I followed him. I was nervous as heck as we were not alone in the restroom, but I decided I had to mention the fact that I wanted to watch him have sex with my girlfriend. He actually mentioned that he wanted to date her, but sex while I watched intrigued him as well. He ditched his friends and came with us when we left the restaurant. On the car ride home I told them both to sit in the back and start making out. My girlfriend was like "What!? Already?!?" but eventually I started to hear kissing and even some caressing as I was driving. I turned back to look every so often as I drove and the sight of them making out made me so hard. I told them not to stop and to keep going at it.... Finally we arrived home, as soon as all of us entered and we closed the door behind us, I pulled down my pants. Again my girlfriend was like, "What the hell, you're so horny you can't even wait!!" but whatever, she was laughing and starting to have a good time. My tiny four inch Asian dick was hanging in its bush of black hair as I followed them to our room. I asked to them to both strip slowly, and I carefully watched the guy strip as I was curious to see his dick. It wasn't huge or anything but it was pretty big, about six inches. My girlfriend then got completely naked, put a condom on his dick, and they started to fuck. The next few minutes I was in heaven, my hot Asian girl was having sex with a white man, and I was there stroking my four incher. As they were going faster so was my wanking. I came early, about two minutes before they were done. There was a pool of jizz just sitting on my stomach and pubic hairs. It was over and he then started to get ready to leave. We talked a bit and plan on doing it again, my girlfriend now loves it and I have a hot new way of jacking off..... Sometimes I prefer it over sex, but don't tell my girlfriend.