Hopefully none.

my sister and I kissed and made out a lot. we also slept naked in the same twin bed whenever we could.

my sister abthed and slept wiht me naked wene i was 9 and she was 12, her skinw as warm and welcoming as was her wleocming chest to rest my head on wene we slept in the same bed XD

I am so jealous that you & your sis stll scissor! I wish for all the world that my sister & I still did!! She taught me how to masturbate on pillows & blankets when I was 2 or 3 & sfe was 5 or 6... Then we graduated to a sort of blind-man's bluff game, where we were naked, & with our eyes closed & arms outstretched, we would "look" for each-other, & end up touching body parts... Then one day, when I was 9 or 10, & she was 12 or 13, sahe told me about a girl at school who used to wake her sister up for school in a very way each morning, & she described scissoring... It tuned me on so much, that I said we should try that right then & there! So we got naked, and I got on my stomach, with my legs opened in a "V" and she got on her side, wih her legs opened in a "V" too, and then we slid into each other until out pussies were locked together... The heat was unreal! With one leg under & one leg over, we each grabbed a thigh & started pumping & grinding against each-other, our asses, slits & clits rubbing hard! We were both so wet & it was so exciting to see her wet pussy, as I looked to the side & could see... We came SO hard!! When we did it again, I was on my back, and other times I was on my side... We scissored/tribbed like that for 5 or 6 years, until I was 15 or 16 and she was 18 or 19... I think it dawned on me that what we were doing was 1) sex, 2) lesbian sex and 3) lesbian incest,and that new awareness prevented me from doing it again, plus she went off to college at that point... And I have never done it again,& now I'm 39... Oh how I miss a warm wet pussy clamped onto mine, going to town humping and grinding ourselves into a sloshy sure fire orgasm!!! It has fueled every masturbatory fantasy I have ever had, and is why I'm even on this site, as tribbing is all I can think about in my down time... I wish I could meet you and your sister and watch or join in...