Drama! Was I wrong here?

It's a sticky situation, but for the most part, no, I don't think you were wrong to tell your friend.

Your cousin should know that it's your best friend she's talking crap to you about, so of course you're going to want to know what the problem is. Then the fact that she wouldn't tell you was immature of her. If she's going to vent about it to you, she should be willing to explain the whole story.

At this point, you probably should have asked your cousin's permission to go to your friend and ask her about the situation. That way it wouldn't seem like going behind your cousin's back and telling her business to your friend. But at the same time, whether you got your C's permission or not, I feel she should have EXPECTED that you would discuss this with your best friend!! So I don't think she should be mad about you talking to the friend.

At this point, your friend and cousin should work things out. Your cousin shouldn't have involved you, as it sounds like it's between her and the friend. If they keep getting you intwined further, tell them that you are now taking yourself out of the whole mess, and it's between the two of them.

I think you were right to mention it to your friend, especially when it is clear that she had no idea there was a problem between them! How can you fix a problem with somebody if you don't tell them there is a problem??

However, at that point you could have backed off. Your cousin obviously has something personal going on, which you don't know the full details of. She could probably use your help, but instead of talking about her problems you got into a huge fight about it. Maybe you can be the bigger person and approach her again and try to find out what is going on?

"I'm not sure why we got into a huge thing the other day. Is there something going on that I don't know about? I hope that you know you can tell me anything."

Anyway something like that.

no its not your fault. your cousin is the one who talk crap to you so technically you have the right to know more about what happen between your cousin and your best friend. Your cousin seem like a drama queen. She probably end up talking crap on you too because of this x_X

I think you should have stayed out of it. While it was admirable of you to tell her because you are her friend, you know the other person is proned to do dumb stuff like this. Now you have them both mad. Next time just ignore it and if you aren't involved, just stay out of it. It's safest that way. Then nobody is mad at you.

you should were right to mention it to your friend, and you both have this terrible drama-causeing person in your life, and honestly, i would distance myself from your cousin if i were you, because neither you, nor your friend need somone like that in your life.

no you were absolutely right. cousin had no right to do that. i always say, "pay no attention to those who talk behind your back, cuz it means you're already a step ahead" :P

I dont think you were wrong, but maybe you should have come into it a little bit slower, not butting in..

your friend deserves to know.