My Naughty Girlfriend - Cover

My Naughty Girlfriend

by Popsicolous

Copyright© 2026 by Popsicolous

Erotica Sex Story: A house party reveals my girlfriend's true colors.

Caution: This Erotica Sex Story contains strong sexual content, including Ma/Fa   Cheating   Cuckold   Gang Bang   Group Sex   Anal Sex   Double Penetration   Facial   Masturbation   Tit-Fucking   Voyeurism   .

“Sweetie ... you’re okay if I go alone, right?”

Tina and her younger brother were throwing a party in a large house just outside the city. My girlfriend Jenna had been invited. I hadn’t. I figured it wasn’t a coincidence.

“Just watch out for Aaron,” I muttered. “I’m sure that idiot will try to hit on you tonight. If he even tries to bother you...”

“Don’t worry, I know how to handle a horny eighteen-year-old,” she interrupted with a laugh.

She was dismissive, but the knot in my stomach wouldn’t budge. Aaron, Tina’s brother, was a real ‘all muscles, no brain’ asshole. But honestly, if he were just some random gym rat, I wouldn’t have cared. The problem was, he was constantly on the prowl. And he’d even hit on my Jenna.

One day, we were leaving the beach after a morning in the sun. Jenna looked killer in that tiny bikini. Then we ran into the dickhead and his usual group of idiots.

“Holy shit, look at those big boobs!” Aaron shouted. “I’d kill to get a piece of that!”

His crew burst out laughing. The asshole followed up with a blowjob gesture. Tired of his shit, I started toward him, ready to lay him out, but Jenna grabbed my arm. “He’s just an arrogant kid,” she whispered.

“A kid? I’ll teach him some manners!”

“Leave it, please. Do it for me.”

I sighed and gave in. I wanted to deck him, but I couldn’t. It wasn’t worth ruining Jenna’s friendship with Tina. I had to let it slide. Even if he had it coming, it wasn’t worth the fallout.

“Good,” she murmured, squeezing my arm. “Just let it go.”

After that, I couldn’t help but feel uneasy at the thought of Aaron being around Jenna. Still, my girlfriend had no intention of skipping the party: “Tina would be offended. She’s worked so hard on it.”

That evening, she looked stunning in a black dress that hugged all the right places, paired with heels that made her legs go on for days.

“If I didn’t know you better, I’d think you were showing off for someone,” I joked.

“Quit it,” she replied, pressing a kiss to my forehead. “Don’t wait up for me. You know how these parties go. They don’t end until dawn.”

“Oh yeah? Too bad. I was hoping you’d get bored and call me to come pick you up.”

“Sweetie, try to understand. I can’t just bail, it’d look bad. We’ll see each other tomorrow, okay?”

“Okay.”

“How are you going to spend your evening?”

I shook my head. “I don’t know yet ... I’ll probably just hit up some friends.”

She flashed me one last smile before slipping out the door, her heels clicking down the hallway. I stood there for a moment, letting the apartment settle back into silence. When the front door finally clicked shut, I didn’t reach for my phone. Didn’t text anyone. The idea of small talk, of drinks and half-laughs while she was out there, suddenly felt like too much effort.

So I ditched the plan and ended up on the couch, scrolling for a movie I had no intention of actually watching. But it didn’t stick. After a while, the restlessness kicked in. I couldn’t focus on the screen. My mind kept drifting back to the party: the heat, the music, Aaron hovering around her. How was Jenna behaving? And was that asshole keeping his hands to himself?

I burned through half a pack of cigarettes, but I still couldn’t calm down. Time crawled, a couple of hours, maybe more. Finally, I decided to call. I didn’t care if I sounded jealous or paranoid anymore.

One ring. Two. Three. Nothing. I tried again, but the result was the same. By the third attempt, I was fighting the urge to hurl the phone against the wall.

Must be the music, I told myself. She just can’t hear it.

But the idea of spending the rest of the night trapped in my own head was unbearable. I couldn’t do another two hours of this. I made up my mind: I’d join her. Uninvited or not, in the middle of that chaos, nobody would notice me.

I drove to the house and parked a few meters from the open gate. The music was deafening. The front door stood wide open, lighting up the lawn where a few people were hanging out. In a dark corner, tucked away on a bench, I spotted a young couple lost in a heavy make-out session.

As expected, nobody paid me any mind. I stopped a girl I knew by sight. “Have you seen Jenna?”

“Jenna who?”

“My girlfriend.”

She looked down, suddenly flustered. “Um, no ... I mean, I saw her earlier, but I don’t know where she is now.”

Before I could press her on that odd reaction, she slipped away into the crowd. I kept moving, scanning the room until I found a guy busy swigging from a vodka bottle.

“The busty one?” he laughed.

“Yeah, she’s ... curvy,” I stammered. “Blonde, black dress.”

“Oh, the blondie? Yeah, I saw her.” He took another pull from the bottle. “Hard to miss in that dress, she’s a total smoke show.”

“I see,” I murmured, struggling to keep my voice steady. “Do you know where she is?”

He shook his head. “I wish. I was planning to hit on her, but I haven’t seen her since. Why? You know her?”

“Just a friend. I have a message for her,” I lied. After what I’d already heard, admitting I was her boyfriend felt like a mistake.

“She’s definitely getting laid tonight,” the guy observed, gulping down more vodka. “She seemed wild. Rubbing herself on everyone. A friend of mine grabbed her ass half an hour ago, and she didn’t exactly push him away.”

My stomach twisted. He was just a drunk idiot, right? He had to be lying. I started to turn away, but he grabbed my arm.

“Take a sip, bro,” he said, shoving the bottle toward me.

“No, thanks.”

“Whatever. Hey, if you find that skank, send her my way.”

“Don’t worry,” I muttered, pulling away.

I finally spotted Jenna in a small lounge area, crowded with tables loaded with drinks and snacks. About ten people were huddled inside, joking and drinking. A few were dancing in the cramped space.

Jenna was sitting on a small sofa. Aaron was right next to her. They didn’t notice me, lost in their own conversation. With the ambient noise, I couldn’t make out a word, but then my girlfriend laughed, threw her head back, and pulled Aaron close by the hair, shoving her tongue down his throat.

That can’t be her, I thought. She’s just ... she’s too drunk.

I watched, stunned, while they began making out passionately. The jerk caressed her thighs before moving his hands to grope her breasts. Jenna didn’t shy away; she only kissed him harder.

Aaron gently took one of her hands and guided it to his lap. She pulled back for a split second, flashing him a smile. Then, I watched her unzip his pants. She tugged down his underwear, and his cock sprang out, already hard. Jenna gripped his shaft, testing his size. No one around them seemed surprised.

Not satisfied, Aaron pulled one of her breasts free from her dress to lick it. Jenna’s eyes drifted half-shut, her face masked in pure pleasure.

The world around me tilted, my vision fraying at the edges. I bolted outside for air, collapsing onto a bench to steady my racing heart.

I don’t know how long I sat there in the dark, replaying the scene. I burned through a couple of cigarettes, waiting for the shaking in my legs to subside, before finally gathering the courage to go back in.

Jenna and Aaron had disappeared. Another couple had claimed the sofa. I began to pace the house, desperate to find her. I wanted to scream, to lash out, to see the guilt on her face. I needed to know how she could have done this. I wanted to hurt her the way she’d hurt me.

I searched every corner, but she had vanished. It was only after several frantic laps, my heart hammering against my ribs, that I felt a hand on my shoulder.

“Look who’s here,” said a voice I knew well.

I whirled around to find Aaron standing there, shirtless in just his shorts. I couldn’t help but stare at his pecs and those sculpted abs. He caught me looking, shot me a challenging grin, and sneered, “What are you looking at? You ain’t turned faggot, have ya?”

“Where’s Jenna?” I asked, ignoring his jab.

“Oh, you mean the bitch?” he chuckled.

“Tell me where my girlfriend is!”

“Relax, dude. She’s upstairs, first door on the right.”

“Who’s she with? What’s she doing?”

“Find out for yourself, cuck.” He put emphasis on the last word.

I was too shocked to pay any attention to it. So I ignored him and his laughing, and bolted up the stairs. I found the first room on the right immediately, standing slightly ajar. My heart hammering, I crept closer and peeked inside.

The bastard was telling the truth: Jenna was there, on all fours on the bed, completely naked, her ass in the air. But she wasn’t alone. She was passionately giving blowjobs to the two guys in front of her. The other two were behind her and were taking turns fingering her ass. This wasn’t the Jenna I knew. With me, she barely sucked it a little to get it hard. But now I watched her take their hard shafts deep down her throat and hungrily lick their hairy balls.

“Look at her,” one of them growled. “Aaron wasn’t lying. The bitch is a fucking machine!”

“I do my best,” she replied, pulling her mouth off his cock.

Meanwhile, she never stopped jerking them both off. “I’m glad you’re enjoying the service.”

“Where’s your boyfriend?”

“Who cares? He’s out with his friends, I guess ... or he’s at home jerking his pathetic little dick. I’m way too busy with you animals.”

“Keep going, slut!” said the other guy, grabbing a handful of her blonde hair and shoving his cock into her mouth. “Suck it like you mean it ... and shut up!”

Jenna went back to giving more blowjobs. Clearly, the roughness turned her on. She was panting loudly as the two dudes behind fingered her ass.

I should have been disgusted, but the scene was perversely arousing. Jealousy twisted my stomach, but lust clouded my mind. So I continued to watch in silence, careful not to be discovered.

“Hey, guys,” she called out. “Enough with the fingers ... I’m bored...” She wiggled her ass cheeks vigorously in their faces. “Please, fuck my ass!”

I watched, paralyzed, as one of the guys stepped up behind her. He grabbed her cheeks, spreading them wide to expose her flushed, throbbing anus. A heartbeat later, he pressed the head of his cock against her. Jenna let out a long, visceral gasp as he thrust deep, forcing his way through her tight sphincter.

“Yes!” Jenna moaned. “Right there! Break my ass ... fill it up ... you’re definitely bigger than my boyfriend!”

 
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