No, this story does not involve my actual step sister. If you're into that sort of thing keep scrolling, sorry to disappoint. Just want to be upfront about that. Names of people have been changed, obviously.

Skip to the "__________________________" marker for the sexy part

A brief backstory is that I was an only child when my parents got divorced when I was 10 years old. It was for the best, even as a child I knew my mother wasn't the best person and I think my dad just kept it together "for the sake of the kid." Anyway, fast forward 5 years and my dad meets this woman who also has a daughter. They hit it off and after about two years of dating they get married. So now I have a new step mom and step sister. Fast forward to today and me and my step sister are close friends. We have loose boundaries and are comfortable enough with each other to just walk into eachother's rooms and whatnot.

So, here is where the actual story begins. My parents were gone for the weekend and my step sis, Rena, planned to have a few of her friends over for a slumber party. She ran it by me first to make sure that I would be cool sharing the house with a bunch of girls for a night. I appreciated that as it showed her consideration and also gave me an opportunity to make plans around it. Here is where I should mention that Rena is about two years older than me, so all of her friends are older too. Naturally, I wouldn't take any issue with having a bunch of older women in the house for the night. I let Rena know that it's cool with me and that she had reign over the house. I told her that I would be in my room most of the night, I had just started a new run through RDR2 and just got to the part where the game lets you loose for the first time at Horseshoe Overlook so the world was my oyster.

She said, "I hope you'll be wearing headphones, don't want us to disturb you with what we're getting up to tonight."

That phrase really wouldn't have registered to me normally, but she had this wry grin as she said it that made it sound way more suggestive than it should've been.

"What's that supposed to mean?", I replied back.

"Just that you shouldn't be worried or alarmed if you happen to hear...something."

Ok, so she just not-so-subtly said that she was going to be having an orgy with her friends. Great.

It was a bit weird to sit with that knowledge, but like I said, Rena and I are pretty close so whatever she does with her friends is her business. I hold no judgment. I carried on with my day, though still curious just what they were going to get into tonight. I finished up dinner, took a shower, and got ready to settle into a night of outlaw living. Or so I thought.

Rena's friends started to show up around 8PM. She has a pretty tight knit friend group from college. I couldn't say for sure, but if I had to put money on it I would say that Macy and Brooke were here. Meghan would probably show up, and Kiara would probably stop by later. Yes, Rena's friends are pretty attractive so having the knowledge that they would be getting into some dirty shit did lay heavy on my mind. I put my headphones on and tried to immerse myself in the game. A nice ride on my trusty steed through the American western frontier should be able to hold my attention. But then, I heard them.

,,_________________________________________________________________,,

Even through my headphones, I heard some giggling, a bit of yelling, but what halted me in my tracks was the moaning. It started soft, but was undeniable now. At least one, maybe two voices were letting out some pretty loud moans. The images in my head became more vivid as this new soundtrack emerged. I tried to focus on the game, but the only shooting that was about to happen was in my pants. I hopped into bed, stripped off my sweats and begun to feel around, listening to the passionate cries next door. My orgasms are so much better when thinking of someone I have a personal connection with, rather than porn online. I pictured Brooke getting fingered by Macy, both of their perky tits jiggling with each thrust. I then pictured Meghan underneath Macy, her tongue getting acquainted with Macy's clit. Sensually passing up and down in a steady rhythm.

My hands were gripped around my dick, the moans through the wall picking up in cadence. My hands matched this increase in tempo. I was stroking faster, my throbbing cock approaching climax. In my mind, Brooke was convulsing and was squirting all over Macy's hands. I was at the tipping point, just on the verge of cumming when all of a sudden...

THWACK!

My door swung open. I immediately turned under the covers. What a convenient time to walk in, Rena. I thought to myself. I hoped she just needed to grab something quickly off the dresser and would leave. I heard the door close, time to get back to business. However, when I picked my head up from my sheets there was someone still in the room.

"Ohh, so there is a boy here!"

"What the hell are you doing in my room!?", I shouted.

"And wow. You can really hear us.", she continued. Completely ignoring my question.

I wasn't too familiar with this girl. I recognized her vaguely, but couldn't quite remember her name.

"It's Chelsea.", she said. As if she could hear my thoughts. "I came over here for the Super Bowl last year, ring a bell?"

I guess that did ring a bell. Yeah I sort of remembered.

"Uh, sure", I replied. "You still didn't answer me, why are you in here?"

I needed her out of here. My dick was still hard and because I inadvertently edged myself, precum was getting on my sheets.

"Well," she started, taking a seat at the edge of the bed. "If you couldn't already tell, things are getting pretty hot and heavy in the other room." She then started to rub my feet over my covers. "Eating out girls is pretty fun but..." she looked right into my soul. "But I really want some cock."

My heart started to pound. I definitely did not envision anything like this happening. It sounds like the plot of a bad porno. I regained my composure, I'm sure this was just a prank from Rena. She planted this all in my head with her ominous warning earlier. That was bait so that this prank would be more believable.

"Rena sent you in here, didn't she?" I said. "All that moaning, that's just you guys messing around. You're all in on it. You guys are all fucking and you want my cock? Why are you fully clothed then?"

Chelsea kept her gaze on me through my reply. She broke her eye contact to say,

"I didn't want to take the fun of undressing me away from you. But if you really don't believe me," Chelsea pulled off her top. Not even a bra on underneath. Her two round breasts bounced a couple times before settling. "Believe me now?" She smirked.

"Wow." was the only thing I could say.

"I know you were jerkin it dude, like I said you can hear the moans very loudly. Any normal guy would do it. Let me see."

I was frozen. I didn't what to say or do. I was at her mercy. Chelsea reached for the sheets and pulled back, revealing my manhood standing at full attention. Chelsea smiled,

"Very nice, man." She seemed to be admiring it, but her tone was so casual, as if I was showing her a rare baseball card. "So," she grabbed the base of my cock, "you need me to help with this?" Her eyes fluttering at me as she asked. All I could do was nod slowly, still paralyzed from the unlikely series of events unfolding before me. Chelsea grinned, she planted her tongue right where my balls met the shaft and slowly licked the length to the head. Fuck. That felt amazing. She went for a second passing, this time when she got to the head she gave it a soft kiss and giggled.

"I really do like your cock, dude. Very suckable." She winked.

"Mmmhmm" was all I could say back.

Chelsea altered her technique. She now focused on the head, wrapping her tongue around it and swirling. Each flick of the tongue, making my cock twitch. Her hand now gently sliding up and down my shaft. Her soft touch allowed me to feel safe in her care. Around and around her tongue went, running a spin cycle on my sensitive dick. Now I was the one moaning.

"Ohhh, big boy really likes that, huh?"

"Fuck. Yes" I said between heavy breathing.

"Well how's this?"

Chelsea then put her lips around the head of my cock. Now, in addition to swirling with her tongue, her lips were sucking hard. This girl could get peanut butter through a straw. The hand on my shaft started to grip harder, and the once gentle sliding became firm stroking. My hips were beginning to buckle, she knew she had me.

Lick. Suck. Lick. Suck.

That became all I knew, the warm, moist feeling of her tongue massaging my tip, and the suction grip of her lips embracing my swollen head.

Lick. Suck. Lick. Suck.

I was leaking precum again, though Chelsea did not seem to care at all. In fact, she was reveling in it. Her other hand began to softly massage my balls. Her fingers kneading my sack. Occasionally her finger would reach past my sack and graze against my taint. I was unsure if this was accidental, or a warm up for escalation to ass play.

Lick. Suck. Lick. Suck.

I couldn't take it anymore. I was already worked up from my session before. The feel of her tongue, now pressing on the tip. The sound her mouth made with each suck of her lips. My cock was the hardest it's ever been, I must've grown another half inch in her mouth. It was time, I couldn't hold back. My thighs squeezed around her head, my cock pulsating.

"Holy fuuuuuuuuuuck" escaped my mouth involuntarily.

I couldn't see it but I could feel rope after rope shoot down Chelsea's throat. This woman was staring into my eyes the whole time. God damn was that hot. My cock continued to lightly quiver inside her mouth but the cum stopped flowing. Not even someone of Chelsea's skill level could handle the load as cum began to seep back onto my cock from her mouth. She finally unsheathed herself from my member.

"Holy shit dude, that was a ton of cum," she said, wiping her mouth. "I didn't even get to have my fun yet." She said sarcastically disappointed.

"Well, allow me to return the favor." I replied, I didn't want to let her down and I really wanted to suck on those nipples.

This write-up took me a bit longer than anticipated. I'll continue the story in a Part 2 if there is interest for it. Let me know!