I'm a little shy about this story because I shouldn't have been fooling around with my sister at her age but that was ten years ago and she's OK
One time when my sister was 12 (I was 15) we were sort of playing around. My breasts had been developing and she wanted to feel them, so she felt my breasts through my T-shirt. It felt good. She pinched my nipples and I felt an electric shock that went straight down between my legs. All I knew was that I wanted some more of that. I asked her to suck on my nipples. I pulled my T shirt up to my neck and my sister put her lips on one and then the other, sucking harder each time. I got super turned on.
I didn't tell her that, but I thought about it for a week while I touched myself in bed at night. Then I got up the nerve to ask her to do it again. She didn't mind at all, in fact she said that she got kind of excited doing it. I told her to keep sucking and I put my hand down inside my pyjamas and came very fast. It was SO exciting. After that sometimes when we were alone upstairs at bedtime I would knock softly on her bedroom door and she would come in for another session. Pretty soon she started rubbing herself while she sucked on my breasts. I would always come first and then I would hold her to my chest while she kept rubbing until she came. For some reason I never returned the favor, or wanted to, and she never asked.
We did that off and on for maybe a year and then I met my first real boyfriend and we didn't do it again after that. But even now, a long time later, I get wet thinking about it. She is married now and lives in another state, but I wish I could knock on her door again tonight. When I see this on the web I'm going to call her and tell her to read a certain story on Solo Touch.