The Mysterious Stranger and Bad Girlfriend

This is the origination of our Mysterious Stranger series, a post by Final Change. This occurs much later than the prior posts. Much like The Mysterious Stranger, who learns how to move between realms and dimensions, these stories will do the same. Enjoy! - BL et al

The Stranger seemed to drift out of nowhere. It was late in the airport and I was one of the few people left in the terminal. I didn't even notice he had sat down beside me until he spoke.

"She's pretty." He gestured to the cover screen on my phone.

"Oh. Oh thanks."

"Is that your girlfriend?"

"Yes. That's Katie. I was supposed to be home tonight for Valentine's Day — then my flight was cancelled."

"Bummer luck. She looks nice."

"Yeah." I sighed and looked at her photo, feeling a bit uncomfortable with the presence beside me, especially with empty rows of chairs all around us.

"Can I ask you a question?"

I shrugged. "Okay."

"Is she faithful?"

"What sort of question is that?" I snapped.

"Questions are questions. Merely. It's an honest question, is it not? Is she faithful?" The man's eyebrow raised higher. His glance was steely. He didn't seem to ever blink.

"YES! She's a good girl."

He nodded. "But how do you know she's a good girl?"

"I just do! Now will you excuse me, I'm going to find a bench and get some sleep before my flight in the morning."

"One last question — and then I'll let you go."

"Fine." I grumbled. "But make it quick."

"What if she were a BAD girl?"

"Bad girl?"

"I mean she looks very sweet and proper in that photo. But what if your girlfriend were a BAD girl?"

"I don't even know what that fucking means."

"It means, what if she were the opposite of herself. This existence occupies a space between dark and light after all. You can almost guarantee there are mulitple instances of this universe, and in one of those exists her polar opposite. A bad version of her. A very bad girl."

I was nearing the end of my patience. "I can't even imagine what that would be like."

"Then you aren't taking my questions seriously." He looked me straight in the eye. "You're not even trying."

Something about the way he said the last statement made me uneasy. He continued.

"I can imagine it completely. She has blonde hair in this photo. The bad version of her has black hair. She wears black. She isn't some nurse in a hospital. She's rich and lives in a mansion. She has spiked nails and a piercing in her nose."

"Spiked nails?"

"Spiked nails." His mouth perked up in the corner into a twisted smile. "So here's the million dollar question: would your Bad Girlfriend be faithful to you?"

I scoffed. "I can't answer that question."

"For those who lack imagination, there is experience. Better to have imagination. Put yourself in her shoes."

"What? Look, dude. I'm done with your riddles or whatever you call this. You're a weirdo."

"Fine. In lieu of your imagination, we will do it your way. Here's to Experience!"

The room shimmered only for a moment as I awoke upon a view strange yet uncanny. My world shifted 180 degrees so that, at first, my girlfriend's pussy was not immediately recognizable. I gazed at confounded, watching the man's tongue work it's way through the pink, familiar folds, around the throbbing clit which (a) I felt and (b) was suddenly recognized from above.

Black-checked stockings clung to the circumference of my thighs, accentuating the space between them and my pussy, and the vacancy left behind by my now non-existant dick. My crotch was smooth and blooming with a pussy flush with arousal — only the tiny patch of cleanly shaved pubic hair was now black instead of blonde. It was mine. My scent of my girlfriend's favorite perfume swirled in my nostrils. I watched the man's tongue and moved my tongue against the roof of my mouth in concert. It felt smaller, dainty, and more nimble.

"Oh fuck."

The Stranger stood in the corner. "What kind of shoes does your Bad Girlfriend wear? And you better answer this question quickly if you know what is best for you."

"Heels! Fucking black heels."

I hooked one calf around the shoulder of the man who was intently working between my thighs, touching my heel to his back. Only now do I realize I was settling in. Getting comfortable.

"That's right. She wears black heels."

The straps wrapped around my ankle, holding the heels to the contours of my feet. My girlfriend always wore flats because they were more comfortable. But my toes were jammed into these black heels. I was wearing woman's shoes. My feet were small. I could a heat building in my pelvis at the idea.

"So. How about now — are you now, finally, in your Bad Girlfriend's shoes?"

"This isn't real." I tried to deny it even as I moaned at the finger inside of me.

"Leonard. Give him a sample. If he's any kind of man he will recognize the flavor of his own girlfriend. It's going to help him realize who she is now."

I leaned forward intently and licked his finger, recognizing the sweet taste immediately. It was my girlfriend's. The pussy between my thighs was a mirror of hers. It even tasted like hers. I was so sweet. I took his finger into my mouth and moved over it. He had pressed it inside of me so well, the only thing I could think about is teasing him with the thought of me fucking him.

Being horny made me feel empty. I wrapped my fingers around my thighs, spreading my legs wider, feeling my spiked nails rub on the underside of my stockings.

"Who are you?" asked the Stranger, stepping closer.

My mind was reeling. I was my girlfriend. I could feel the piercing through my nose, like a bull, and my black hair in my peripheral vision. The stockings cut into my thighs. Leonard flipped me over and rested me into position straddling him.

"I asked, who are you?"

"I'm Bad Girlfriend." A jolt shot through my pussy at the admission. I smelled like her. Sounded like her. Tasted like her. I was her. But like I had never seen her. Clad in black. Pierced. Dripping. Desperate for attention.

"That's right. You are in her shoes. And the straps of those heels around your ankles will ensure those shoes stay on for the duration of our experiment."

"If your girlfriend was Bad Girlfriend for one night. . . " the Stranger smiled. "What would you want her to say?"

My mind reeled. My pussy was gushing. I could feel the heat of Leonard's dick beneath me as he rubbed my pussy. The words just came to me. I realized how true they were. Almost truer than anything I had ever said.

"I'm so horny I need that thick cock in my pussy NOW."

Leonard complied. Leonard complied so well I came on his cock in four pumps.

The Stranger walked around me as Leonard fucked me. "I'm pleased. We now have an answer to our question and penetration is no longer banished to your imagination." He laughed. "If you were in your bad girlfriend's heels, you wouldn't be faithful to you. You'd fuck Leonard, just like you are now."

He grabbed my chin. "You see. Bad Girlfriend can say whatever she wants. Because she is honest. She understands her desires and what it''s like to let go and be fucked and wear what she fucking wants and LIVE a little. Bad Girlfriend is a force of nature. Already you are understanding what a relief it is to let your hair down and take what you want. It's something you can't deny away by avoiding the questions of a Stranger." He let go of my chin. "Leonard, flip her over."

Leonard pulled my back with his strong hands and flipped me over on the chair. My tummy filled with butterflies at being handled so strongly. I settled back expectantly. He was making me hard. I realized it was no longer a matter of inches — it was one of millimeters. My clit was swollen and pulsing from my folds, packed with nerves and deeply rooted in me. I shook.

"But now we have a little problem. Jumping dimensions is tiring, even for a Stranger. Much more tiring when I have to drag someone along to teach them a lesson. It's nearing time for me to leave — and I certainly don't want to expend any more energy than I need to."

"I don't understand."

"Leonard, mount her."

Oh fuck. At the demand I instinctively clung to my thighs and pulled them behind my head. I was ready and the cock pushing into me was so good my eyes crossed.

"Let's make it easy." The Stranger laughed. "Like a bad girl you are riding bareback. How naughty. And Leonard's cock is a ticking timebomb. At some point it's going to fire the huge load of cum – the cum your moans and girlfriend's tight body are inspiring in his balls."

"Oh fuck."

"Yes. I think you understand by now that this is real. So let's put it this way: You must make your choice before your tight little pussy takes Leonard's cock across the edge."

"Choice?" My words shook. "W-what choice?" Leonard was railing me, slamming into me. It was okay. I liked it rough.

"Should you stay — or should you go? If you go, there will be trouble. You will remember being fucked this way always, but you will be with your lovely girlfriend back in your usual realm. If you stay, it will be double. You will have known you chose to remain in your girlfriends form. You won't be you anymore. You will be your girlfriend. Forever. The bad version of her. The one you no longer have to imagine because I've put you in her shoes — those delicious tits weighing on your back, and the darkness within you desperate for the next fuck. And you are, aren't you?"

"What?"

"Desperate to be fucked."

I swallowed and whimpered. My pussy clung to the cock with every exit, as if begging for it to return. It did. Over and over and deeper and deeper.

"I'm going to be late. Tell Leonard to fuck you. I want to hurry this up. I have somewhere else I need to be."

After I said it, I caught myself. It was too late. Too natural.

"Fuck me, Leonard!"

I said it with all of me — my thighs pulled back, desperate to be pummeled — but realizing the sand on my hourglass was just reduced significantly. Leonard's thrusts doubled their tempo. Was it me, or was his cock starting to feel thicker...

The Stranger, sighed. "I'm waiting. Make your choice. Leave with me or ride that thick cock out to it's grande finale."

Time slowed, even as Leonard sped up. My nipples were about to pop they were so hard. I loved feeling them swaying on my chest. I loved the cock hitting deep in my pussy. I loved the ring in my nose and wearing all black. It made me feel confident, like a woman, receptive to every dick, and desperately craving more. Already I knew I was much cooler than the nice version of me in the dimension I came from. Thinking of her made me hotter. I thought about our long hair intermingling and our big titties touching and pressing our pussies together.

My whipers grew more cooing and quick. My pussy was feeling the rush of momentum and my time to make a choice eeking away thrust by thrust. What's worse is I was spurring Leonard on, taken in my dark image, demanding him to fuck me harder and moaning things like "right there" and "your cock is so fucking good."

I could feel a change in Leonard's cock. It did feel thicker. His breath was becoming shorter. My tummy was a mess of butterflies, punctuated by the head of his cock every moment. My tits shook on my chest. I tried desperately to think even as I tensed the muscles in my pussy to cling to his cock.

Everything said, I had no complaint with Leonard. He had nice pecs, beautiful eyes, and he really knew what he was doing with a pussy. I knew deep inside I could learn a lot from him — and I wasn't thinking about to try with my girlfriend. I was thinking with my pussy.

I was in love with it and what it was doing to my pussy. My feminine body was responding to a cock so close to firing, desperate to spark off Leonard's ejaculatory reflex and milk the resulting invasion to the last drop. I was a woman now and it was only natural. I was all receptivity and invitation. My body made more fluid to accomodate him, I looked down to see his cock coated in my juices, fucking me.

I took a deep breath and tried to ground myself, inadvertantly clinging tighter to his veiny cock. I tried to go back. Before I had arrived here in this mansion, this body. I concentrated on being in the airport without the Stranger. I imagined finding and sleeping in a bench and going home to Katie. I thought of her sweet face in the picture and tried to forget her doppleganger who I now possessed.

And suddenly, I had clarity, I knew what I had to do. I had cheated. On her and myself. But it was simply time to go home and make this an experience to learn from. I cried out to the Stranger to take me home, clinging tightly to the cock inside of me in determination, savoring the last time I would be filled with cock.

"Stranger. I'm ready. I want to go ho— "

Leonard stopped thrusting, grabbed his cock, and bellowed.

His thrusts were replaced by a quick succession of spasms.

A flood of heat coursed through throbbing pussy lips.

Oh fuck. What was happening?

I watched Leonard's cock slip out of my pussy — and yet a fullness remained.

No.

I dropped my hand to my pussy, my long fingernails framing my tight, over-full pussy. It shouldn't have been so hot — seeing it hovering at my pussy gates. Leonard's pearly white come. No. No. No. My pussy was filled to the brim. I could feel it. Why did it feel so good?

In the moment, Permanence was almost too much to comprehend. I was aroused, satiated, and enamored with delicately touching what Leonard had left behind. My asshole quivered as I relaxed my pussy muscles to make room for it. I wanted to keep Leonards hot, sticky payload inside of me, as my pussy's creamy center. It was my first load and something in me didn't want it slipping out just yet.

"Well," the Stranger said. "I honestly was expecting you to go back. Your girlfriend was lovely. You've made a compelling and brave choice! To be her opposite in a different dimension. To cling to Leonard's cock and take him all the way. It was amazing watching you. Seeing you fucking him at the last second to take him over the edge — almost as if you were worried you would choose to go back home. Watching your tits shaking on your chest and realizing they would be there to stay.

I bit my lip. Did I really do that? I had been sure I had been focusing on getting back.

"It's all very hot. I love what you said it, too. "I want to go "ho."" You went all in, didn't you? To be a ho. That pussy is all yours now. Congratulations"

I moaned. My pussy was already missing Leonard's cock. His cum crested in my pussy, threatening to dribble out over my virgin asshole. I was too late. Banished in this other realm, with my girlfriends tits. And yet strangely, all I could feel was relief.

"Tell me. Did the Good version of you use birth control in her dimension? Or did your boyfriend pull out."

"He pulled out." Oh god, was I already accepting this? I wanted to double down on denial, but the Stranger kept talking.

"How unfortunate."

I nodded. He kept saying true things. It was unfortunate. Good Katie was such a prude. I wasn't like her.

"Do you remember where you were in your cycle?"

"I had my period two weeks ago."

"Interesting."

"Oh god, Stranger. Will I be having periods now?"

Stranger looked at me. "I mean, you are a woman." He let out a short hmmm, thinking. Then he addressed Leonard. "Leonard, your cum seems to be dangerously close to dripping out of her. Help the new Bad Katie out and put it deep within her. Let's give her period a little time off. I think dealing with periods is a little too much for a new woman who is just beginning to enjoy herself."

"Oh god. What are you doing?"

"Giving your womb something to work with."

I watched his cock jam his come back into me and moaned "Oh shit Oh —Yes!" That word came out. Yes. Knowing his come was deeper inside gave me the strangest feeling: Relief.

"My womb?"

"You complained about your period. I find it's best to double down when people complain — so they gain perspective. A period isn't so bad."

"Getting pregnant isn't EASIER than a period, is it?"

"You get to find out over time as your belly swells. Don't worry, your body will be flooded with maternal hormones. It will help you settle in. And I'll be back to check on you. In nine months, let's say. I always want to make sure all of my little experiments are coming along nicely.

I had to admit it: I fucking loved being filled with cum. And even with the hint of pregnancy, I wasn't moving into a position to expell his cum. In fact I was doing the exact opposite. I leaned back. I realized by how tightly I was gripping my legs and keeping them raised that I knew what I was doing. Assuring fertilization. My pussy wanted this. My womb wanted it, too. I wanted my girlfriend's body knocked up and pregnant TODAY. I wanted to see her tummy growing in the mirror — and unlike her little prudish way of living, I could make it happen. I prayed the full-body orgasms Leonard had inspired during our fuck session had coaxed my cervix open.

The Stranger tipped his hat. "I have to be off. Katie, do you want Leonard to stay?"

I felt my lips curl into a smile and looked at Leonard. "Leonard isn't going anywhere. I want him inside of me again. He needs to make sure I'm good and pregnant."

The Stranger nodded in approval. "Another compelling choice."

Hi. My name is Katie.

I'm Forever Bad Girlfriend. It's slowly sinking in. Like the weight of her tits on my chest. Like Leonard's deliciously thick cock. Like his sperm into my egg.

.

"Hey Janice — we found some guys stuff at Departure Gate A-32. It's a backpack, man's jacket, and a smart phone."

"Just take it to the administrative office and have them enter it into lost and found."

"Okay. I don't get it. This is a nice phone."

"It is weird, but it happens more than you think. Especially around that gate. Try to unlock his phone, maybe we can call him."

"It looks like it has a passcode on it."

"What a shame — that girl on the screen is very pretty though."

"Yes, she looks nice."