[M/F] Kind of cheated on my girlfriend with my step sister…

So this happened less than a week ago. Sounds like a clickbait-y buzzword kind of /r/gonewildstories title, but this is 100% true.

My and my stepsister’s parents have been together for a few years but don’t live together, so I rarely see her. We’re both 18, both still in high school, and both get along really well, but I’ve never really felt any sexual tension, despite the fact that she’s 10/10 model gorgeous. She kind of has this hippie/hipster blonde chick thing going on that I usually wouldn’t go for, but works really well for her.

Anyway, we were recently on vacation and watched a movie in her room with both our siblings. She was wearing a big loose shirt and loose cottony shorts. I fell asleep about halfway through the movie and woke up to find her sister asleep next to me and her still awake, scrolling through her social media. Everyone else had returned to their rooms.

I lay there next to her on the bed and she noticed I was awake. After a while of just laying there, we started whisper talking about some random high school bullshit and I began absentmindedly playing with the hem of her shirt. I moved my hand slightly and felt it brush against something rough. I felt around to figure out what it was for a second until I realized I had slid my hand under her shirt and the bottom of her shorts, and what I was feeling was the lacy waistband of her panties.

I quickly moved my hand, but she didn’t react. I began to feel myself getting hard and realized I was turned on, lying here with my stepsister thinking about touching her. It didn’t help that at this point we were looking at porn that she’d reblogged on her tumblr…

So, eventually, the little head won out over the big head, and I moved my hand back up her shorts to her waistband, sliding up her shorts and taking a quick peek in the process. Her panties were all black and all lace. I was definitely pretty turned on, and started playing with her waistband, slipping half a fingertip beneath the band and into the gap between her mound and hips. After a while of me tracing her hip bones with my fingertips, she said, “I know, they’re really prominent, [sister’s name] always complains about them.” That was the first acknowledgment of what I was doing.

The second came when I got a little more bold and dragged my finger tips down her hip and to the inside of her thigh. She gave a soft little moan and I instinctually said “hm?” She replied, “oh, that just tickles” and continued scrolling through her tumblr. My hand came to rest less than an inch from her pussy, so close that I could feel the damp heat coming off of her through the lacy fabric. I deliberated for a looong time before I finally gave her leg a little squeeze and pull. She opened them slightly and moaned again as I slid a finger down from approximately her clit to the soaking fabric at her entrance.

I was really questioning everything at this point, but I wanted to touch her so, so badly. I wanted her to cum, hard, and I wanted to be the reason why. Eventually, after a lot more thinking and toying around with the lace between her legs I withdrew my hand and said I had to go to the bathroom.

Maybe a disappointing ending for you guys, but we didn’t have sex. I ended up having a Vincent Vega moment in the mirror, thinking of my girlfriend, thinking of my step sister’s sister sleeping next to us, and asking myself if I really wanted this to go further before I went back to the bed and told her that I was going to sleep. There was a long pause before she said goodnight, and then I promptly speed-walked to my room, shut the door, and furiously masturbated.

So, that’s it. We watched some more movies on other nights but I didn’t touch her again. The sexual tension was insane, and I probably jacked off 5-6 times a day just to stay faithful, but it never went further than one long, slow stroke on her clit.

Source: reddit.com/r/gonewildstories/comments/46zlwl/mf_kind_of_cheated_on_my_girlfriend_with_my_step