Threesome turns into cuckolding when I cum premature [cuckold]

 Back in my college days (M21 at the time) I was always out partying or at the bars. I was never much of a ladies man and hadn't been laid since the summer between high school and college. My friend Cody (Not his real name) on the other hand was always getting laid. I was always in awe and frankly jealous. 
 There was one party house we went to regularly, that we would always run into this girl named Ashley (F20). She was a cute blonde girl, about 5' 3", small perky boobs, and a nice athletic butt.  She was kind of known for being a slut, but I didn't care, I was obsessed with her! 
 I would always try and flirt with her, and it always seemed like it was going well, but she would always leave with another guy at the end of the night. Well one particular evening Cody and I were at that party house, and low and behold Ashley was there. We were both flirting with her all night. 
 The drinks were flowing and we started playing a drinking game that involved truth or dare at times. Someone asked Ashley "What sexual fantasy do you have, that you haven't done?" Ashley giggled and said "I've always wanted two guys at the same time. Hehe" Cody and I both we both shocked. We continue on with partying, and at the end of the night Cody had talked Ashley into a threesome, and I was lucky enough to be suggested as the 3rd.
We end up going to her place across town, and Cody drove us there in his truck. Not the smartest move, but it was almost 0 degrees and it was over a mile.  We get into her apartment and she practically threw all her clothes off the second we got through the door. Except her bright pink thong.  Cody picked her up and carried her to the bedroom as they made out. I just shut the door and followed them.
 I didn't really know what to do, so I stripped down to my boxers and walked over to the bed. She was on top of him kissing him all over as she started pulling his clothes off.  I kind of just awkwardly rubbed her back (so dumb in hindsight). She pulled his dick out of his boxers and I instantly knew I was out matched. He was probably 7 inches and thick. I on the other hand was not even 5 on a good day. 
 I sat there for a couple minutes before I just thought "screw it, I'm going in".  I pulled her thong down to her knees as she was on all fours still giving Cody the blowjob of a lifetime. She got excited and said "Oh fuck me daddy". I had never been called daddy before and that got me even more excited. I plunged all 4.5 inches into her pussy from behind.  She was soo wet and tight. I pumped 3 times and felt it coming, by the 5th pump I pulled out and sprayed cum all over her back and a little on Cody's leg.  
 She stopped blowing him and looked back at me with my dick in hand. "Well that was fast" she said while laughing. Cody on the other hand was not happy about getting some of my cum on his leg "That's F*ing gross dude!" He yelled.  The embarrassment of blowing my load almost instantly and getting yelled at (also probably the achohal) made my dick shrivel up and I couldn't get fully hard again.
 I then spent the next hour and a half watching them fuck in every position possible. It looked like she came at least 8 times throughout.  I couldn't even leave because Cody drove.  Finally he got her on her knees and shot rope after rope all over her pretty face.  She then jumped in the shower and Cody said "Let's go bud" and we drove back home.  I never talked to Ashley again, I was far to embarrassed to ever face her again. She probably just remembers me as the guy with the little dick who just came instantly and just became a cuckold of sorts.