My girlfriend B and I were invited to my cousin S and her husband Q’s place to hang out and it had been a while since my girlfriend and I had last seen them. I call S my cousin, but she’s technically a family friend. She was a Japanese student who had lived with my actual cousin for half a year when she studied abroad to my high school. Their relationship was just as real as any pair of sisters I had met and as far as I was concerned, she is family.
When we arrived, my cousin’s husband had been acting kind of odd. Leading up to this day, nothing had seemed out of place, he and I had been talking about how he had been looking forward to hanging out after so long.
They picked us up from the station and we grabbed lunch before spending some time shopping. It wasn’t until we got to their place that I would understand what they had planned.
Typical of Japanese apartments, there wasn’t a lot of space. After entering the door, there was a short hallway to the living room. Halfway through there was a door led to the bathroom. There, you’d find a sink, a door to the toilet and a door to the shower. The shower door was one of those where it blurred whatever was on the other side, but generally you could make out the shapes of whatever or whoever was behind it.
My girlfriend and I were sitting on the couch in the living room while my cousin and her husband were sitting on their bed. The living room and bedroom were conjoined, but there was a long sliding door that could be pulled across to separate the two rooms.
Up until now, things had been fairly normal and we were deciding what to do for the rest of the night. This was when they sprung their idea on us.
“Recently J and I have started a new lifestyle and it’s been pretty fulfilling. We were wondering if you might be interested,” S said.
“What is it?” I asked.
They started to talk about a new individual who they had introduced into their sex life. It started off as a mixture between voyeurism and cuckolding as Q liked to watch, but nowadays it was closer to a threesome.
Sometimes she and their friend would still fuck with just the two of them whether Q was watching or not.
The entire conversation had caught me by surprise and for the most part I could only listen. By the time the gears in my head began to move again, they told us that we should consider joining them.
“No way,” I replied. My mind was still in a haze as I continued to try and process all this new information. “I can’t even begin to understand what you’re asking of me.”
“It might be faster to just show you,” she said as she and her husband got up from the bed and went outside. They were gone for at most 5 minutes before S came back, but without Q. Instead, there was a different man beside her, he was a white guy with a fairly handsome face. He was only a little bit taller than her and wore a blue v-neck t-shirt that showed off his defined muscles. They stayed in the genkan (a sunken space at the entrance of a home where people take off their shoes), blocking the door.
“This is R,” she said. “This is our partner we were talking about.”
“Like I said, we’re not interested,” I replied. My girlfriend had been fairly quiet throughout the entire exchange so far, but it seemed as though we shared the same opinion.
“You should really give it some more thought,” S pressed. “It’s really fulfilling.”
“Look, our answer doesn’t change,” I replied. “You know, I think we should really get going.”
“If that’s what you want,” The man said. “You’re really missing out though.”
He shrugged his shoulders as he began to walk down the short hallway. My heart began to quicken as he took his first few steps toward us, but he turned towards the bathroom and I couldn’t help but feel a little relieved. Moments after, we could hear the the shower start.
This time H was the one to approach us, but she just went back to sit on her bed.
“We won’t stop you, but you really are missing out,” S said. She was speaking towards both of us, but I could tell that this time she was directing this specifically at my girlfriend.
Before I could say anything, my girlfriend B replied instead. “Yea, I really think we should get going.”
I mentally let out a sigh of relief.
“It was really nice seeing you and Q again,” B said. “Do you mind if I use the bathroom before we go?”
“It was great seeing you again too,” S said. “And of course! You know where it is.”
At the time I hadn’t noticed it, but whenever I think back to that moment I can’t help but imagine that a smirk flashed on S’ face as I turned away from her and towards the hallway. To this day, I don’t know if it was just a part of my imagination.
My girlfriend got up from the sofa and walked towards the bathroom. Her big ass looking amazing in her short denim skirt. I was never not impressed by her butt considering how rare it was to find an ass like that in Japan.
I watched her walk down the hall and make her way to the bathroom. The exact second that the last strands of her hair left my vision as she turned into the bathroom, I noticed my heart speed up. A small sinking feeling began to creep into my stomach even though I reminded myself not to worry.
She had declined S’ invitation herself, what was there to worry about? That’s what I told myself, but I couldn’t shake the feeling in my gut. Only a few minutes or so had passed, but I felt the sinking feeling in my stomach grow. Before I knew it, I had gotten up and made my way towards the bathroom. I wish I could have seen the look on S’ face. I can only imagine the expression she was wearing.
It was only a second as I briskly walked into the bathroom, but it felt like an eternity. I pushed open the door and I saw the same view I’ve seen many times. A sink to my right, the door to the toilet on my left, and the shower room straight ahead. A thousand thoughts were racing through my head as I quickly moved to open the door to the toilet. If I had been calm, maybe I would have paid attention to the shower door more closely.
The door handle fully turned. My girlfriend often left the door unlocked when she went to the bathroom so that wasn’t unusual. I quickly pulled open the door. My heart began beating rapidly as I could hear it pound clearly as if my heart had somehow made its way up from my chest and into my ear.
There, my girlfriend sat on the toilet seat, her denim skirt pulled down between her ankles, and the pink lace thong that I loved just slightly peaking out above the denim. My girlfriend looked at me with a confused expression.
Is what I wanted to say.
Instead, I find the toilet light off and an empty seat. I pause to process the information, but my body begins to move before I can even string together a coherent thought.
I close the toilet room door. I move towards the shower room and I can see the blur of a figure behind the door, but I don’t spend any time trying to analyze it. I push it open and the white guy is the first thing I see. His dick standing to full attention, but that’s not what I care about.
The door, which usually swings all the way outward and touches the back of the shower room only opens halfway as it’s stopped by something behind it. I ignore R as he smiles at me and I walk into the shower room. My girlfriend stands naked behind the door. A look of guilt and ecstasy on her face. She was like a bitch in heat. I could see how wet she was by the shine of the liquid between her legs.
I didn’t know what to say to her. The only thing running through my head was my imagination playing back the moments leading up to this moment.
I picture my girlfriend entering the bathroom, her hand stopping in front of the door to the toilet. Her eyes locked on the shower door where she could see the figure of R showering. The door was the same on both sides so I’m sure he knew someone had entered the bathroom.
My mind fills in the blanks as to what happens next as the shower door opens at the exact same instant she twists the handle of the door to the toilet.
If she had been just a moment quicker to open the door or R had been a moment slower to open the shower room door, this whole situation could have been avoided.
She’s frozen at the sight of a naked R. Her eyes traveling down his muscular torso until they lock onto his rock hard cock. He’s not as thick as I am, but it’s a little bit longer than mine.
He doesn’t waste a second as he steps out of the shower and grabs my girlfriend.
She’s like a deer in the headlights as she’s pulled into the shower before she can even understand what’s happening.
Just as she begins catch on and starts to pull away, he’s already pulled her close to his chest. His free hand wrapped around her back and the other guiding her hand to his member.
The phrase “lady in the street, but a freak in the sheets” describes my girlfriend so well, and normally I’d never have even the slightest worry that she’d cheat on me. But today was just the perfect storm.
I know she would never want to admit it, but while we were on the same page about declining S’ offer, the story had turned her on. That’s why she had been so silent earlier. She had been listening intently.
R kisses B firmly on the lips while simultaneously pulling her body closer. His chiseled chest pressed tight against her perky c-cup breasts. There’s still some fight in her as she realizes what he’s doing. She tries to not let him have his way with guiding her hand to his big cock, but that slowly fades away as his firm kiss transitioned into a gentle one.
She’s always been weak to just the right mixture of being manhandled and treated gently. And once that switch is turned on, she turns into a slut that I can get to do just about anything for me in bed.
The tips of her finger make contact with the head of his dick as she begins to wrap her hand around his throbbing cock, finger by finger. She slowly starts to jerk him as her pussy begins to drip.
Just as a moan begins to escape from her lips, R takes full advantage as he gently pushes his tongue into her mouth. Her tongue hesitantly meets his as he begins to have his way with her and she closes her eyes.
At this point her white t-shirt is soaking wet and sticking to her body skin tight. Her pink bra clearly visible as his hand unclips it through her shirt with a practiced hand.
Without missing a beat, he pulls away from her. She was still sticking her tongue out as a string of saliva kept the two connected until he slipped the shirt and bra off her in one smooth motion. Tossing it into the bathub.
Her hand was already stroking his long hard cock of her own free will from the base of his shaft to the start of his head.
She had been so turned on and engrossed in the kiss that by time she realized he had pulled away and opened her eyes, she was topless, R had a handful of her tits, and he was coming back in for his second helping.
B’s thoughts couldn’t keep up with the stimulus of how fast everything was progressing, but as the speed at which she jerked off R picked up, he knew everything he needed to know about how horny she was.
It was at this exact moment in time that I stood up from the sofa. And it was at this exact moment in time that R unbuckled the button on her short denim skirt. As I made my way towards the bathroom, R slid her skirt and panties down her legs. As I opened the door to the bathroom, R had a handful of ass while shoving his tongue down my girlfriend’s throat. As I opened the door to the toilet, moans escaped B’s mouth between tongue movements as he lifted one of her legs up with the free hand that wasn’t focused on squeezing that tight asscheek. And as I closed the toilet door, R slipped his hand away from that big sexy ass to two fingers deep into her hot wet pussy.
Her moan was muffled by whatever sense of restraint she had left and the noise of the shower as R began to finger B’s pussy. R curved his fingers towards himself while moving his fingers in and out of B, stimulating her g-spot.
He was only about 4 pumps in, B’s toes curled on the foot that R was holding up, when I pushed the door open. The sound of the door popping open brought B back to her senses as she pulled away from R. Her back touched down on the wall of the shower room as the string of pussy juice fell to floor. R smiled with his fingers still in the fingering position as I pushed through the door, returning to present-time as I stared down my girlfriend.
There wasn’t really much to be said. A few “what the fuck”’s here and there. Kicking R in the chest before having B pick up her damn clothes and cussing out my cousin good bye.
B had basically sobered up from the moment I kicked R in the chest. All she was left with now was guilt and embarrassment. It was a silent train ride back to our station and a silent walk to our apartment. I didn’t know what kind of look my girlfriend had on her face as we went home. I didn’t even try to look and see.
But the second the door to our place closed and the click of the lock echoed through our otherwise silent apartment, it only took one second for our eyes to lock before we were all over each other.
It might have been important to mention that I have a fetish for stealing other people’s girlfriends. A fantasy we often role-played together as I pretended to be someone else who would seduce my horny bitch of a girlfriend.
We fucked all night and the sex we had that night probably changed the dynamic of our sex life from that day on. It ended up opening the door to many other dangerous and hot situations just like that day as I discovered how much I enjoyed to play with fire.
Source: reddit.com/r/eroticliterature/comments/mcgocr/mf_how_my_cousins_invitation_to_swinging_almost