One night, my girlfriend was out with the girls and I decided to have a guy friend over. My guy friend is a pretty horny guy, so he obviously wanted to invite some chicks over. I'm a very loyal boyfriend, so I said, "No, invite one for you, and when my girlfriend gets back we can all go out to a bar." It turns out that the girl he invited was my sister-in-law! I have never seen her so dressed up and so hot! She's married to my brother, but I didn't want to rat out my best friend, so I went along with it. They started making out on my couch, and they sort of invited me to join. We ended up having a threesome, and my brother nor my girlfriend know to this day.
— Rick, 21