A Different Kind of Party
Copyright© 2025 by Fanlon
Chapter 11
Erotica Sex Story: Chapter 11 - Tom and Mandy dreamed about what it would be like to go to a swinger party. When they received an invitation, they were ecstatic. There was only one little problem: that invitation came from Tom’s little sister, Stephanie. They would discover far more from their new friends than they'd ever imagined.
Caution: This Erotica Sex Story contains strong sexual content, including Ma/Fa Mult Fiction Brother Sister Group Sex Swinging Exhibitionism Oral Sex Voyeurism
I don’t know why the fact that Beck had called Mandy today surprised me that much, but it did.
“Beck called you?” I asked, with a both interested and curious look on my face.
“Mhmm, she did,” Mandy nodded, grinning at my sudden reaction to her announcement.
“And...?”
“Nothing, just telling you she called.”
“Mandy!” My hands flew up, my fork remaining upright, still firmly buried into the steak on my plate.
“What?” The brat giggled.
“You can’t just tell me you had an interesting conversation with her like that and then not tell me about it!” I flopped back into my chair, arms folded over my chest and waited. I sat like that for what felt like ten minutes, waiting for her to tell me something, anything about the call. Mandy just cut off a piece of steak and popped it in her mouth, and then, moaning in pleasure, her eyes fluttered closed as she dramatically savored the taste of her perfectly cooked meal. “Seriously!” I barked, she was driving me nuts, and she knew it. “Tell me already, for fuck sakes.”
Mand’s shoulders shook as she chuckled, and lifted her hand, palm out, telling me to wait while she quickly finished chewing.
“So, Beck called and told me we were having them over for dinner on Sunday, and she was really, and I mean really, excited.”
“Oh, yeah,” I grunted. “Jeremy and I talked today, and I invited them over for dinner.”
“Thanks for the heads up,” the sarcasm was so thick it was almost dripping from her words.
“Sorry,” I grinned weakly. “I figured you’d be all for it, honestly.”
“I am!” Mandy shifted her position in the chair. When she got excited, she could never hold still. I smiled. “That wasn’t the only thing we talked about, though.”
“Oh?”
“Yup,” she nodded. “There is a big party coming up.”
“Yeah, I know. We already knew that.”
“No, no,” she shook her head, her eyes wide. “This one is way bigger.”
“Cool?” I replied, not sure if I was supposed to be excited or not, so my answer sounded more like a question.
“I had to promise not to tell you too much about it,” Mandy hurried to explain, the words coming out so fast I my mind could barely digest them before she was on to the next. “Ohmigod, Tom. Ohmigod!”
“Why can’t you tell me?” I had a feeling I knew exactly why. Beck, she wanted to be here and tell me. That was either a very good thing or fucking horrible.
“Beck wants to umm...” Mandy blushed, lowering her eyes slightly, which made me want to lean even further. “She wants to be the one to tell you the story from last time.”
“Good or bad?” I asked, hedging my reaction to her answer.
“Amazing ... I think.”
I sucked in a deep breath and let it out in a rush. I could feel my stomach roiling, the nerves getting to me for reasons I couldn’t truly understand.
“And you won’t tell me what it is?” I asked, pushing again to see if I could get her to answer without me flat out demanding it. She shook her head fast from side to side. “Okay, guess I’ll find out about this massive party on Sunday.”
“This is going to be so fun!” Mandy bounced in her seat, grabbing her fork and knife again. “Eat your food before it gets cold!”
The last bite of steak was just as good as the first. The flavors and texture were perfect as I chewed and reveled in its tenderness before swallowing. Looking down at my plate, it was almost sad to see it empty. Even the last vestiges of the fatty juices from the steak and the melted butter and olive oil from the asparagus were gone, used as a dip of sorts for each chunk of the ribeye I’d cut off and shoveled into my mouth.
My stomach was beyond full, but that didn’t stop me from sighing, dejected, as I placed my fork and knife on my plate.
“You look like someone just stole your puppy,” Mandy joked, and I started chuckling. She wasn’t wrong. “Don’t even think about—”
“Is there any more left?” I asked, cutting her off and looking at the pan still sitting on the stove. I was full beyond full. My stomach was tight, and I probably looked like I was entering my third trimester, but that didn’t matter. I just wanted more.
“Don’t even act like you’re still hungry,” Mandy rolled her eyes at me, emphasizing that she knew I was already stuffed.
“Is that a no?” I asked, jutting out my bottom lip. Pouting for all I was worth.
“Oh, for God’s sake, knock it off,” she laughed at my display, and as much as I tried to hold it back, I grinned and laughed right along with her and then groaned, holding my stomach at the discomfort from overeating. Mandy noticed right away and pointed at me, waving her finger at my stomach as if I didn’t know what she was indicating. “See, I knew it!”
“Oh, shut up,” I growled and then groaned again, my hands wrapping around my middle as if that would offer some sort of relief to my gluttony.
“Come on,” Mandy said, her voice soft, comforting. “Let’s go watch a movie. I’ll do the dishes later.” I nodded my agreement and stood up, groaning in such a way that even my grandfather would have been impressed. “You’re ridiculous,” Mandy rolled her eyes as she got to her feet, but there was a smile there that her eyes couldn’t hide. “Come on, I want to snuggle for a while. I don’t think you’d be up for a good round or two of good sex tonight, so I’ll just have to settle for your tickling my back while I lie my head down in your lap.”
I grumbled under my breath. I was absolutely up for a couple of rounds tonight, but then the pressure and discomfort in my stomach reminded me that even if I wanted to, that was no longer an option, and worse, I was my own fault.
I took up my usual place on the edge of the couch, resting against the paddle armrest. Mandy pulled off her shirt, exposing her chest to me for a moment before she lay down on her side, her head resting on top of my thighs. While she was scrolling through the various streaming services we had, I ran my fingertips up and down her back in the long, slow, languid motions she loved.
This went on for almost fifteen minutes before she offered me the remote, saying, “I can’t find anything good. You pick.”
I just shook my head, taking the remote from her in my right hand while my left kept exploring her smooth, warm skin. I switched to my own profile. She was obsessed with true crime and rom coms, so it was no surprise that that’s all she got for options to choose from. I wasn’t in the mood for something like that. So, my profile was the obvious answer. It would be littered with action, suspense, and even some thriller options.
I went through the first category and found the complete Twilight Saga. Shit! I tried to click past it as fast as possible, hoping she wasn’t paying attention or just wouldn’t notice, but I wasn’t fast enough.
“Oh! Edward!” Mandy cried out excitedly, her back tensing, and she pointed at the screen.
“Hell no!” I laughed and scanned for enough that not a single one of those five movies was on the screen.
“Tom, please!” Mandy whined, twisting and turning so that she could look up at me. “I love those movies!”
“Don’t I know it? We’ve watched them half a dozen times in the last year,” I grumbled, still scrolling. “I can’t take any more of that crap.”
“But—”
“Do you want me to keep rubbing your back or not?”
Her face scrunched up, eyes narrowing as she thought about that question. I knew what the answer was going to be; I just needed to wait for her to come to the same foregone conclusion. When she sighed, dejected, I smirked as she rolled back over, wiggling her body in an attempt to entice me to pick up where I’d left off.
As soon as I started running my fingertips along her sides, she purred in pleasure and snuggled in, remaining perfectly still, aside from the slow raising and falling of her back as she breathed deep and slow.
“About this morning...” Mandy said.
“What about it?” I replied, my attention more on the screen and the brief descriptions of the movies than what she was saying.
“You know, Stephanie and the in the kitchen, naked, what she said...” The moment she said Staphanie was naked, my hand stopped moving across her back, and my attention zeroed in solely on my girlfriend, who was still not looking at me. Mandy’s whole body tensed. “I promised we would, umm, talk later.”
“Mhmm,” I replied, setting down the remote. Mandy knew the jig was up, and this was important. She rolled over, looking up at me with a sorrowful expression in her eyes. She genuinely looked worried, which made me even more on edge.
“Don’t be mad, okay?”
I cocked my head to the side, eyeing her. “Mandy...”
“Please! It’s nothing bad, I promise.” Her hands snaked out, grabbing onto mine and pulling them to her perfect, bare chest, which was now fully exposed to me again.
“Just tell me what’s going on.” My voice was harsher than I intended, and she flinched in response to it.
“So,” Mandy stammered, taking a second to calm herself. “Steph and I talked last night.”
“And?”
“She wanted to know how the party went at Bruce’s and I...” Mandy’s face flushed nervously. “I told her what happened.”
“Okay...” I knew there was nothing off limits when those two got to talking, but I hoped there was one thing she’d left out. That would be the whole Daddy thing. I didn’t think Beck would be happy or appreciate it if she’d found out Mandy was telling people all about that behind her back. I knew I wouldn’t be.
Honestly, I was still trying to understand the whole thing myself. I mean, her calling me Daddy was still really weird, but also kinda hot. Actually, it was really hot at the moment and made me feel amazing, but also dirty all at the same time.
“Your sister didn’t believe what you did to Beck. She was calling bullshit. Telling me that there was no way you did that to Beck.” Mandy’s face tightened up in a mixture of defiance and anger as she told me about it. “I kind of got mad and then told her how you made her scream at the top of her lungs as she came over and over. She also didn’t believe me when I told her you had Beck on her knees at your feet, begging for your come, but then...” Oh, fuck, here it comes.
“Mandy, you didn’t.” I didn’t need to finish the sentence; she knew exactly what I was referring to.
“What was I supposed to do? She called me a liar!”
“So, what if she did?” I wanted to take those words back the moment they left my lips.
“I’m not a liar, Tom!” Mandy’s voice was fierce, her eyes narrowed to slits. There was an anger there I hadn’t seen before. “What you did was so incredible, I can’t even put it into words how fucking hot that was. When she started calling you daddy, I...” Mandy bit her lip, her face as red as I’d ever seen it before.
“You shouldn’t have told her that!” I groaned, throwing up my arms in defeat.
Strangely, it wasn’t that my girlfriend was telling my sister about the whole thing. That realization was a shock to my mental state as much as anything. But that wasn’t what bothered me; it was the fact that she was telling anyone about it. Some things should just remain private, at least until you’re given explicit permission to talk about them, and I was pretty confident no such permission was given!
“I thought we were supposed to be honest about everything?”
“We are, definitely, but—”
“I’m being honest with you, Tom! Because I love you and there shouldn’t be any secrets between us.”
“I know,” I sighed, I knew there was no putting the toothpaste back I the tube now. “I love you too.”
“I’m sorry,” Mandy’s voice went from having a hard, determined edge to it to being so soft and delicate that it was jarring. It’s almost as if I’d just suffered emotional whiplash, and I didn’t know how to handle it.
“Did you tell Beck about this whole thing when you talked to her?”
Mandy’s eyes widened, and her head jerked left and right.
“You need to—”
“I know, I will this weekend, okay?”
I nodded, and she smiled, her hands reaching up, her fingers lacing behind my neck. I smirked, and she smiled. I let her pull me down, and our lips met. It was only for a blink more than a second, but it was enough that both of us were smiling when we pulled apart.
“Now, since there aren’t any secrets,” I said, Mandy smiling up at me, unaware of what I was about to say. “Tell me about why the bedroom door was open and why Stephanie walked into my kitchen naked, accusing me of fucking you through the mattress.”
“Well, I umm...”
“You umm?”
“Okay, fine, I wanted your sister to hear us, okay? I wanted her to hear you making me come, happy now?”
I knew deep down her reply was coming, and I still didn’t know what to say when she hit me right in the face with it!
Weirdly, the rest of the week leading up to Sunday was ... completely normal. I’d assumed, wrongly, I’ll admit, that things would have changed in some ways, but they hadn’t. There were no awkward looks or pauses in our conversations, nothing. It was as if we hadn’t indulged in a swingers’ party and fucked two complete strangers. A husband and wife we’d never met before and somehow ended up balls deep into after a brief conversation at a kitchen table.
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