Here's the story, basically I was fifteen at the time of this and my older brother was seventeen. I had never really masturbated but my friend had told me about it at school so I decided to try it out when I got home.
I got home and went up to my room and locked the door. I put my fingers into my pussy and started rubbing my clit and it seemed to be going OK. Suddenly I heard a noise and turned around to see my bathroom door [that is connected to my room] opening. I forgot that the other toilet was blocked so people were using mine. My brother walked out and apparently, I am not smart enough to take my fingers out of my pussy or turn around or anything.
So, anyway, he walks in while I have my fingers in my pussy. I was frozen in panic and he said, 'Hey, let me help you out there.'
I decided to see what he was going to do. He walked up to me, took my fingers out of my pussy and then, put his own fingers in. He stimulated my clitoris so nicely, it was the best feeling ever!
Suddenly I felt the rush of orgasm and came right into his hand. He pulled his fingers out, looked at his hand and licked it all off.
'Nice,' he said, and then walked off.
He left for college the week-end after and only came back yesterday. We haven't spoken of our great experience and are not planning too.