I have a almost 3 years younger brother, when we were children we played games involving ”sexual exploration”. (My mother tongue is not english, so my english is not perfect) We would pretend to be asleep and "accidently" touch each others private parts, on our clothes and sometimes inside our clothes. We have also been lying on top of each other a few times as far as I can remember, but there has been no kind of penetration or "fingering", we didn’t engage in oral sex, we didn’t kiss each other, and there has been no sexual attraction between us whatsoever. We continued this game, until I started to notice that my body was about to change, I started to get pubic hair, my first reaction was to not let him touch me inside my clothes, and then shortly after it stopped completly. One of the first things that happened in my puberty was that I got my period, almost at the same time I got pubic hair, my breast came far after that. Shortly after the games stopped, few months after, we shared a bed when we were on holiday, my brother tried starting our games again a few times, and I turned him down except for this one time.... I guess that I knew somehow that it wasn’t a good idea, and I didnt let him touch me inside my clothes because I didn't want him to get so close to my developing body, I was also in the end of my periode. I fell asleep though, and woke up because he put his hand in my panties, I feelt so disgusted, (and the fact that it was during my period made it even more shameful to me) I immediatly pushed him away. The game ended for good. Now, I wonder if that was a sick behavior on my part? I’m so affraid of that, and I can’t stop thinking about it, some days I can't even get myself out of bed because of these thoughts..! It's so painful, I feel like a molester!
I can forgive my brother, and look back at him as a child who was curious, and even though it was very inappropriate I know he didn’t do it to hurt me.
Sometimes I can loook at myself as a child too, who just started her puberty and think that maybe it wasn't that strange after all. I was curious and that it's a healthy sign that it feelt wrong, and that the games stopped at that point instead of continuing long after puberty started... But I can't silent my mind, that I'm a sick person because of that last time we played our "game".What do you think, is this just exploration?
Please help me, I really need it.

-- Wed Oct 29, 2014 9:17 am --
Schould mention that My puberty started very late, so the last time we played, I was 14, my brother just turned 12, which means he wasn't extremely young and kids his age had probably also reached puberty. I was the little girl, a head shorter then the other girls still wearing kid sized clothes.