First Time Seeing A Real Ass And Puss (step-sis)

So, I have never told anyone about this, but i think about it all the time, even 6ish years later. I was a majorly horny 12yo boy who had never seen a real puss and ass. When I was 11 my mom married my step dad and he had a 15yo daughter. She was absolutely BEAUTIFUL! And she knew it... She has this a$$! Big ol softball player ass... very athletic... Anyways, Our parents were gone to Florida for the Daytona 500 that spring. My sis had 2 friends over. They got sooo freakin drunk. I didn't hang out with them, i was into my video games as always. It wasnt till everything got quiet. I went to check and my sis's friends were pretty much passed out but i could not find my sister. I went to the guest bathroom, and there she was laying on her belly, arms wrapped around the toilet. Poor thing had been throwing up, but she was passed out. I first noticed her leggings and thong were halfway down her butt crack. I think she was trying to change or something.. I tried getting her up and she barely responded. So, me being a horny young boy i decided to pull her leggings down further... man, i remember how hard it was, those leggins are sooo tihgt. But i got them down enough to see her ass and puss hole... I didnt touch, i just got my face 2 inches from her ass as i jacked off... i'll never forget that... nowadays my step sis is a butt model... yes, a butt model!!! She's smoking... also, i never knew a girls ass hole could be soooo hairy.. at first when i seen it, it turned me off... now, i love hot girls that dont shave their puss and ass. Thats due to my experience when she was passed out.