I was 9 or 10 when it first started. I'd always idolised my older brother (he'd have been about 16 or 17 at the time).
He started playing with me more, games and stuff in my room, letting me play videogames with him and stuff.
One afternoon when our parents were out we were in my room and he told me how pretty I was. I blushed like crazy but he made me feel so good. He then slowly moved over to me and gave me my first ever kiss. I couldn't believe what was happening.
He was firm but gentle as he lay be down and kept kissing me. He eventually said that he would love to see me without my clothes on. I asked if it was ok, as I was his little sister. He said only if we don't tell anyone, and you're sure you want to.
I stood up and slowly took all my clothes off for him. My heart felt like it was racing and I fumbled taking off my panties, but eventually I was standing totally naked in front of my older brother.
I had just begun to develop some tiny breast buds but other than that, I had a little girl's body and I wondered if he would like what he saw. He obviously did though, as he just gazed at me for ages, asking me to twirl or dance for him. It was the first time I ever felt sexy or beautiful.
He eventually came over to me and started gently touching my body. He played with my nipples, squeezed my young small bum cheeks, and stroked my hairless pussy. I loved all of it and was beginning to wonder if I was in love with my brother and could be his girlfriend.
He took me to my bed and opened my legs and began licking my pussy. Nothing could've prepared me for how good that felt. After about ten minutes, my hips stomach and legs tensed up and I had what was obviously my first orgasm.
My brother didn't ask me to do anything to his cock that day, but the next day I asked if we could play again and if I could see his cock and do nice things for him as well. I gave my first ever blowjob and swallowed my first semen. It was another week before we actually had sex, an evening we knew our mum would be working late and dad was away for the weekend. I remember it took a bit of time for my young body to acclimatise to the feeling of being penetrating, but my dear brother was so gentle. He told me he loved me that night and I replied that I did too.
He went to university fairly soon after this but he always said he didn't want any girls there- just his sweet little sister. I looked forward to him coming back SO much. Mum and dad never knew, and still don't.