My first time cheating on anyone was purely accidental (mostly).

I was in college and had just started dating a guy that lived in one of the frat houses on campus. The first few times I went over there, it was just to meet up with him and then go out from there, really never getting further than the main couple rooms downstairs. Whenever we spent the night together it was in my dorm as my roommate spent most nights at her boyfriend's.

One weekend, I went to the house for a party and planned to spend the night there with him. The party was fun, and like at most of these parties I got way too drunk. I mostly remember the walk up to his room. Once in his room we got undressed and had sloppy drunk sex and passed out.

Sometime in the middle of the night, I woke up and really had to use the bathroom. I got out of bed and put on one of his shirts before trying to find the bathroom. I eventually did, and when I came back out, I realized that every door looks the same and I didn't remember exactly where I came from.

I started back the way I thought I came from and was relieved when I saw Ben (my boyfriend's name) on the door. I slipped back in, took his shirt back off and slid into bed. It was a little chilly in the room so I pressed myself up against his body for warmth. I figured his startled response was just from my cold body touching him. He turned over, put his hands on my side, and ran them up and down my naked body, seemingly getting really excited.

I was still pretty drunk, so even after maybe 10-15 seconds of kissing, I didn't notice at first this wasn't my boyfriend. He rolled me on my back, slid his boxers off (this is when I started questioning because we both fell asleep naked), got on top of me, and slid inside me. This is when I knew for sure, because my boyfriend was average size at best, and this dick was stretching me for sure. I muffled a scream as he started pumping in and out.

It wasn't long before my moans of pain turned to pleasure, then into an orgasm. He came about the same time I did, then rolled back over and passed out. I laid there long enough to be sure he was asleep, got out of bed, tried to find the shirt I wore in but between my drunken state and my rush to get out, I couldn't find it and for some reason thought I could just get out and find where I was going.

I went back in the hallway, looking both ways and closed the door behind me. I did remember to look at the name on the door again and saw that the last name initial was different, I didn't even consider looking at that.

I started going door to door reading names. I finally found his door and slid back in, climbed back into bed, and passed back out.

In the morning, Ben and I woke up as his roommate Mikey came back in the room. I laid in bed naked, sheet covering myself as the two of them chatted a little. When Mikey left, I got dressed and went downstairs.

As I was leaving, one of the guys was talking about the girl that came in, fucked him and left, which the other guys of course were giving him shit about saying he was lying. He held up my boyfriend's shirt as "proof". I just slipped out as quick as I could without being noticed.

As far as I know, no one ever put it together that it was me.