Oh lord, did I fuck up. I still don't know how the hell this happened, even given the circumstances. I'm willing to bet not one of you has fucked up on this level.

Me and my sister have always had a kind of buddy-ish relationship. We both like the same things, have the same sense of humor, that kind of thing.

The Friday before last, our parents were away for the weekend. Neither me nor my sister were able to find a date for that night, so we had the idea to raid our parents' liquor cabinet, and watch a movie.

So, yeah, technically, this is our fault for drinking, but we certainly didn't think something like this could happen.

The next morning, we woke up in bed together. Naked. Hungover as we were, we tried to piece together what had happened the night before, hoping desperately it wasn't what it looked like.

It was. Working out the events of the previous evening, we realized, to our horror, that me and my sister had sex. Everything we did, and every position we did it in, came flooding back.

We were so horrified that, for the next week, we couldn't even be in the same room together. I barely saw my sister until two days ago, she came to me with the news that I'd been dreading.

My sister is pregnant. Trying to be as respectful as possible, I asked her if she knows for sure that it's mine, and there's absolutely no doubt about it; it is.

Neither of us knows what to do. We have no idea how we're gonna tell Mom and Dad. It goes without saying we both realize the gravity of this situation. Ever since that morning, and even more now, one question has constantly been floating around my brain: What the fuck just happened??