I have two step siblings that’ve been part of the family for a decade or so, this happened a couple of years ago.
I was visiting my dad and the stepsiblings, and my stepsister, who I’ll call Ashley, and I have always been tighter. We’re only a year apart and both always liked similar music, video games, etc. I never really thought about her sexually, but objectively, she’s cute: straight smile, nicely-pitched voice, cute cheeks. She’s maybe 5’0, but has DDD tits, which the combo makes them look all the more juicy.
This night, we were watching a movie after our parents had gone to bed and we were catching up, and before I know it she is telling me a lot of naughty things about herself: how she has a thing for black cock, how she’d been in an orgy, just blowing my mind.
My cock is getting hard through the whole process, as I begin salivating over how slutty my stepsister is. On a whim, I ask her if I can see her tits, and without hesitation she pulls them out, and I’m playing with her nipples in my mouth. My precum was visible through my shorts, and she asked to see my dick, and I let her pull down my shorts. She looked thoroughly pleased and began putting her juicy lips on my shaft. She could throat about 3/4 of my cock, which I was perfectly satisfied with. Just feeling the spit drip down onto me was enough.
We could both see where this was going: We were going to be fucking any second. I put my cock away long enough for us to get to the bedroom, where she got on top of me and mounted me, with her oversized t shirt pulled over her breasts. By the bite she gave her bottom lip, I could tell how much she was craving to have a cock fill her pussy up. She bounced up and down on me for a few seconds until I had to have control, and I pulled her forward and pounded her pussy. In that moment, neither of us remembered the marriage that related us. All we could think about was how much both of us needed this: a good, raw, passionate fuck.
When I lifted her off of me and I came, I knew I would likely never fuck her ever again. However, I knew that it had to be that way, and I also knew that neither of us would dare speak of it. After all, nobody, not even us, could rationalize what we had done. We gave in to moments of dire sexual need because we were there. We knew we had used each other. But in the most beautiful way.
Source: reddit.com/r/eroticliterature/comments/pb64zs/fun_with_my_stepsister_mf
That’s actually happened?