Ok so I had been having sex dreams about my boyfriend's brother, and they were really making me want him. I told my boyfriend about it, and since we're the kinky role playing type of couple, he said that I should do it and it would turn him on. Well, I went and had sex with his brother in the middle of the night, came back, told him, and he was all turned on. Until he realized I wasn't kidding. He got kind of upset and wouldn't talk to me and said he was shocked. I thought that was what he wanted, so I did it, but now he's upset and I don't know what to do. Another problem is that my fantasy came true, but I can't stop thinking about doing it again! What do I do??

You seriously don't know why your boyfriend is mad at you, oh please. You should leave both of those guys, well because wouldn't that be awkward, how are you going to explain that one to the parents.

Maybe see a counselor or buy a vibrator, to tone down your need to have sex with random people.

We wouldn't tell the parents, its none of their business. And we have been talking about it for a year and he was so insistant on me doing it so I finally did and he didn't like it

Seems to me like you really don't have a relationship with this guy anyway if you can't communicate properly to the point where you'd actually think your boyfriend would want you to have sex with someone else, especially his brother.

How old are you?

Maybe he was just confused as to what he wanted. And I'm in my 20s. Not sure why that matters.

It matters a lot, and you're wrong, he's not confused as to what he wants, you have no idea what he wants. I don't think there's a guy out there who will tell you to sleep with his brother and mean it. Looks like you learned that the hard way.