There are a lot of brother/sister stories here. Some seem to be made up, others seem to have a ring of truth about them but are often shrouded in some kind of 'excuse'. You often read 'My brother was in an accident...he couldn't jack off.... so....' etc. Well, this is true.
It came from two young people growing up together. It seemed as natural as night following day.
During puberty, I was fascinated at what was happening to my body. Some things I loved, others weren't so good. I didnt like my parents telling me that now I was 'a woman' (I was only 13 for fucks sake!) I should not let my brother see me naked or semi nude, yadda yadda yadda.
He was curious about what had happened to his sister, and I was curious about why he suddenly locked himself away in his room for hours on end and I would hear grunting and sighing.
So, one glorious hot summer afternoon, I guess we were both 16 by then, we were out by the lake and I asked him outright if he was jacking off in there. He cried! He actually cried! He told me that he was, but that lately he couldn't get himself off. I remember as clear as day slipping my t shirt off and kneeling in front of him and unzipping his cock. I remember each exquisite texture as he went from semi to full on hard. I jacked him noticing the pre-cum and looking up at him, seeing him staring at my breasts.
Then I remember his breathing pattern change and him spurting all over me. I loved it. I have never felt more powerful than I did at that moment.
I taught him how I like to be fingered.
From that day to this, now and then, we get each other off. Even though we are both married, it seems as natural as night following day.
At no point did either of us try to go further. I never sucked him, he never fucked me. I didn't want him to and neither did he.
Please don't judge, just accept.