[F+M Shapeshifting, F->F/M, M->F, Dog TF]

[CW: Explicit Scenes (Masturbation, Sex), Impreg]

I sat there, partially reclined on the couch. My gaze was fixed on the front door to our apartment. Once again, I tried to check the time to no avail. Our wall clock was hung ever so slightly out of my gaze, and it seemed that I was still just as immobilized as before. Of course, that would make sense. It’s not like I had any way to change myself.

My girlfriend, Lily, was the shapeshifter in our relationship, not me. At first, it had seemed as though Lily only had the ability to change herself however she pleased. But, on the day we were going to move into a new place together she discovered that she could change me as well. While it seemed this power was limited to me - she couldn’t reproduce the effect on any random objects or strangers - that didn’t deter her from having her fun.

Her ‘fun’ sometimes involved heading out for shopping and whatever other errands she could get up to, while she left me here however she felt like. I’d gotten used to looking like anyone, or like no one. Sometimes Lily would steal the look of celebrities, and sometimes I’d be some wholly original creation. But last time she left me home alone, she gave me the body I’d first met her in. Deep red hair, soft and wondrous curves, refined makeup, and even the same blue dress she was wearing that night.

That was the body of the girl I first fell in love with.

That was the body I was insanely attracted to.

 ===

I never had sex with Lily in this body, as our relationship was just getting started. But it lingered in my fantasies, becoming a sort of fixation whenever I needed mental stimulation to finish. Now it wasn’t just my memory of this form, but I had full access to it. Lily left for the day to do some errands and hang out with friends, and I was home alone as the redhead.

I quickly became enamored with my appearance in the mirror. I whispered to myself the kinds of dirty talk I’d want to hear in her sweet and smooth voice, watching her flawless and kissable lips articulate each syllable. I blew kisses to myself, watching my reflected twin do the same. All too quickly, I was worked up and the foreplay wasn’t enough to sate my need.

I stripped. The deep blue dress fell away and I was left staring at myself. No bra or panties, just darkened hose that contrasted sharply with my pale skin, and black stilettos. I posed this way and that, breasts swaying. For a moment, I remained lost in the trance this body commanded. I had mocked the men in the bar for being consumed by their instincts for her, but I now realized I was no different. I found her impossibly hot; she was hotter than any other woman I knew.

But then, it hit me. As though struck by a physical force, I was nearly knocked over onto my shapely rear by the revelation that this wasn’t the girl that I had fallen for… this was me. This was my body now, my form. I was lusting after myself.

I was a woman.

I’d been a girl a few times since we had moved in here, but it was only ever for short periods of time, and frankly, I usually just slept or played video games or something else of that nature. I had never been forced to really confront the new body I found myself in. I leaned in toward the mirror and raised my fingers to my face. Gently, they ran over the surface. The surface felt smooth, as flawless as it looked. I slipped a finger between my soft lips and my eyes widened in surprise. My lips felt smooth, with my digit gliding between them thanks to the glossy coating on them, but they also felt full. The closest sensation I could connect to it was like the feeling of pressing against a full beanbag chair, though you couldn’t feel the individual beads.

I blinked and realized I had been spacing out. My entire finger was past my lips, when I only had meant to insert the tip. I slowly pulled it out, marveling at the way my lips puckered around it. It looked incredibly sensual, but perhaps more interesting was how it made me feel powerful and in charge. I wondered if that was what it was like for a woman to command the attention of a guy, and for a moment, I dwelled on that. Would I want to seduce a guy? Was I even attracted to guys? No, it seemed, despite the feminine body, my preferences were still separately controlled, and I was still straight. Interesting.

I wiped my wet finger on my chest, and then realized what I was touching. My chest, or more accurately, my breasts. Calling them ‘tits’ or ‘boobs’ felt wrong when they were attached to me now, and I understood slightly why women cared about the terminology. My hands gently wrapped around the soft flesh and I let out a groan of satisfaction. While not overtly sexual, it still felt very good. My fingers pressed into the pliant surface and I lowered my gaze from the mirror to watch the events transpiring myself.

As my grasp slid around the modest curves, I started to feel a tugging as though something firm was attached to me. I lifted my palms to reveal two very erect nipples. I gently pinched them between two fingers, blushing as a moan escaped my mouth. If touching my breasts felt good, this certainly was arousing. Each pinch and twist and tug, despite being motions of mere millimeters, was comparable to male experience of manipulating a penis, though this had a different effect. As a guy, arousal and sexual need built up in a central spot. Now, in a woman’s body, I felt a soft tension building up through my frame, spreading across my entire body.

I rushed to bed as fast as I could maneuver on the stiletto heels. I looked down at myself as best I could, saying a silent thank you for both my new enhanced flexibility as well as the not-too-generous bust that allowed my gaze to drift lower. There it was, nestled between my thighs. I hesitated to even touch it, but eventually resolved myself to continue. I’d come this far, and besides, I was far too horny to stop.

It felt strange, alien. I was reminded of the first time I was ever with a girl, except this time, I was the girl. This body… my body was clearly that of a girl who gets wet. Very wet. The slightest touch left my fingers leaving draping trails in the air of a fluid. My fluids. I wondered for a moment if I tasted good, but then decided I didn’t want to test that at the moment. This was enough craziness at the moment for me.

My fingers ran up and down the slit, remaining on the outside of my body. At the pressure of my touch, I noticed the folds softly giving way, sliding out of the path my fingers seemed to be working. Toward the front of my sex, I noticed a couple more folds of flesh. Gingerly my touch continued its exploration, and the reward was instantaneous. I gasped involuntarily, my feet immediately finding the bed’s surface and my hips raising up. A few expletives escaped my lips, sounding incredibly seductive in this voice as I panted for air.

So that was the clit, I realized. The fire that had shot through my nerves was starting to ebb, though the intensity was still seared into my mind. My fingers wandered southward, navigating to their next - and presumably final - destination. An opening was found beneath my touch, and a solitary digit worked past the opening into the cavity. I bit my lip. This was it, I was inside myself in a way that only a girl could be. A second finger joined in. Soft and supple tissue did little to disguise that this opening was surrounded by muscle, and a simple clenched tightened the embrace I felt. It also created a surge of pleasure that was wholly unique.

Within moments, I had figured out a rocking motion with my hips that amplified any back and forth I could get with my fingers. I’m sure I wasn’t even close to the best that I could be, but this was still amazing and intense. I was already plenty worked up, so it didn’t take long before I could feel it coming. Instead of just my balls feeling tight before an orgasm, this felt like my entire body was preparing. It was almost a little daunting, the sheer magnitude of sensations that were building up in me. Still, I couldn’t help but pick up my pace. I went faster and harder at myself, starting to get rough in my movements, until finally, it happened.

The dam broke, and that tension and fire that was trapped behind it was let loose into my body. Toes curled, muscles clenched and cramped, and my legs shook. I wasn’t capable of conscious thought beyond continuing my motions, and the orgasm that shook me seemed to have no end in sight. Vaguely, I realized one hand had grabbed my chest, while the other still worked below. My thumb had found its way back to my clit, and before I knew it, second and third orgasms were shaking me to my core. I very nearly passed out, finally ceasing the stimulation and riding out the last aftershocks. I lay there, glistening with sweat and panting. The worst part was, I still felt horny enough to continue, and after a moment’s pause to catch my breath, continue I did.

 ===

As you can imagine, I didn’t get much done that day. My girlfriend came home, and because I was bouncing on the bed and moaning like a pornstar, I didn’t hear her come in. She stood at the foot of the bed for a length of time without me noticing before she cleared her throat and called my name. I was immediately embarrassed and ashamed, and somehow those were the emotions that drove me over the edge to yet another orgasm. I lay on the bed gasping for air, and the moment my senses returned I scrambled for the blanket and pulled them up over me. I became acutely aware of my state: hair flying wildly around me, sitting in a puddle of my own mess, and I’m sure I’d sweat through my makeup after a day of such excitement.

Lily stared at me, seemingly unsure of what to say or how to feel. Wordlessly, she came around the bed and put her hand on my shoulder. My skin shuddered, and I tilted my head back to look at her. Apparently, she thought that was an invitation as her hand slid over my throat. I couldn’t help but moan softly as her fingers held my delicate windpipe. God, I realized to myself, I was becoming such a slut.

With a simple headshake, I felt the crawling sensation as Lily changed me. I didn’t turn back to male though, nor did my shape change all that much. Instead, I was solidified into a hollow plastic figure that looked eerily similar to the form I just had. My lustful expression was still focused on Lily as she took her hand away and whispered in my hardened ear, “Let me show you how it’s really done.”

 ===

After her ‘demonstration’ of how a woman pleasures herself, during which I dutifully laid next to her, Lily fell asleep. I found myself unable to sleep, much like when I had been a doll. Instead, I waited. When the next day came I hoped Lily would change me back to something more animate, I was disappointed.

Apparently, this would be my ‘punishment’ for having so much fun without her - a day of having zero fun. So that was why I was just laying on the couch, waiting for Lily to come home in the same frozen pose of lust that she had changed me in mid-orgasm the night before. When she finally came in the door, I wanted to jump up, greet her, and share my love with her like I always did. Unfortunately, I was immediately reminded of my frozen state, and merely had to wait for her to approach me.

After setting down her belongings and making sure her keys were on the hook, she started walking over toward me slowly. Our living room was the runway for a strip show, as Lily decided she didn’t need her clothes on for what happened next. She seemed to be aware of my field of view, and would step in and out of it at the sides, each time wearing less and less. First, her shoes disappeared. Then, her top, quickly followed by her shorts. I dimly felt her panties land on me, and then she stepped back into my view and she was naked, bra dangling between her fingertips. It fell on my face, leaving me blinded. Again, I instinctively tried to brush it aside, only to be stymied. Fortunately, after a moment, Lily pushed them away.

Only… it wasn’t Lily standing in front of me. She had clearly used my momentary blindness to shapeshift herself into this form. Though, I was still caught off guard and surprised. She’d never done anything like this before.

She’d never been a guy before.

Standing in front of me was a naked man. I had to admit he was attractive, even if I wasn’t into guys. It seemed like Lily had chosen to be young and fit, reasonably well in shape. She… or rather, he now, had a dusting of dark black body hair across his tanned body, giving the impression of warmth and security. I couldn’t help but stare at Lily, partially due to the petrification effects I was suffering, and partially due to surprise. I didn’t know what he was planning, which was probably the most unsettling part.

He laid down beside me on the couch, cupping my chest with his hand. “Hey baby,” he whispered, his deep voice echoing in my head. I could feel the tingles as he used his power to change me. It normally took significant focus, but he kept up the one sided conversation. “You’re probably wondering what’s going on. Well, I figured since you were a good girl waiting for me all day, I’d show you how great things can feel for a ‘good girl’.” He chuckled, and internally I chuckled too. I was his good girl after all, so it made sense. My mind paused at that. I had never thought of myself as a girl before now.

My eyes flicked over to him, reassuring me that I was gaining some mobility back. I noticed how hot he looked, and then stopped myself again. He was definitely sexy, I realized in my internal narration, while any ‘hot’ girl I could think of didn’t do anything for me. I realized that Lily… no, that wasn’t his name… that Lane was somehow changing my mind. Could he shapeshift brains, thoughts? It seemed crazy, but it was happening.

As though reading my thoughts, Lane looked me over. “I’m sure you’re figuring out why you’re changing back so slowly. It’s because I’m helping you…acclimate to what is about to happen.” I didn’t mind, after all, with how good the day before felt, I was certain Lane would make me feel even better.

He quickly did. As soon as he finished changing me back to a human, flesh and blood girl, he pushed me onto my back, and wordlessly lined up his erection with my slit. He pushed in, slowly, only an inch or so before starting to rock his hips back and forth. As the tip worked its way in me, I was already overcome with feelings. It fit perfectly, much better than a pair of fingers. I was very quickly moaning and bucking my hips, yearning for more to be inserted. Slowly, Lane obliged those wishes. Inch by inch he kept entering me, his massive shaft working its way inside. Before long, he was pressing against something firm. His humping slowed a bit, before a final, massive push.

Something in me stretched, and then ripped. There was a bright flash of pain that left me dizzied and confused for a long moment, before I realized what happened. My virginity, at least as a woman, had been broken. Lane gave me a second to catch my breath and for the pain to subside. It was clear he meant it when he said that he wanted to show me how good things could feel, and he wanted to take care of me.

He resumed again, slowly, once I gave a smile and a thumbs up. He quickly built up speed though, his own male eagerness taking over. The sensation of my insides being stretched and filled to capacity was crazy and unfathomable. As I lay there, my mind lost focus. My breasts sloshed back and forth on my chest as I kept getting plowed by my boyfriend. It was intense, it was erratic. The only sounds filling the air were our moans and panting. Before long, he finished, and I was introduced to the surreal experience of being filled like that. It was warm, wet, and felt voluminous. My mind was also filled with the implications of it, namely, pregnancy. I was a girl, and Lane was a guy. I was sure he wouldn’t let that even be a risk with his shapeshifting powers, but for the first time the importance of protection struck me. Still though, the idea of getting pregnant was too hot to ignore, and I quickly found myself finishing as well.

Despite a quick migration to the bedroom, we didn’t lose our pace and continued well into the night. By the end of it, Lily changed us back to our correct genders and fixed what she had done to my mind. She started apologizing, but I shushed her. She never forced me to do anything I didn’t want to, and I enjoyed every moment of it. We both agreed it’d be convenient for both of us to be bisexual going forward, and I made sure to let her know that from now on, she had full permission to do anything she wanted, and that I’d tell her if I didn’t want to do something.

 ===

“Full permission” is a dangerous thing to give someone, especially a shapeshifter, it turns out. At the moment, I was on all fours, naked, in public. Well, not exactly naked… I was wearing a collar. Normally I’d object to such a brazen display of inappropriate lust, and so would Lily. The only way I had at all allowed this to continue was that I wasn’t human.

I was a dog. A German Shepherd, to be precise.

Lily realized that if she can turn me into anyone she wants, and she can turn me into inanimate objects, then she could probably turn me into literally anything she could think of. So, for the last week I had been living as a dog. Sleeping either on the floor or curled up on the bed, eating and drinking out of bowls on the floor, going to the bathroom outside, the whole thing. Lily’s been having fun with this, and she promised she wouldn’t let it go on too long, but she has been making friends on our morning and evening walks. The fact that she wants to keep up these friendships makes me worried how long she’ll keep me like this, though with our original cover story that she’s only pet-sitting her aunt’s dog, it can’t go on too long.

Unfortunately for me, Lily realized she didn’t like having a dog that still thought like a human. Over the span of the first couple days, she mentally locked away anything that made me act like a human.

My ability to read or write or even understand spoken English? Gone.

My desire for human foods? Gone.

My reluctance to go to the bathroom outside, or to sniff the other dogs? Gone.

In fact, out of some attempt for humor or mischief, she has made me attracted to dogs instead of people. Now, it’s hard to look at Lily as my girlfriend; she’s my owner. She’s a very good owner, and it’s clear she loves me and wants to take care of me. She’s noticed me eyeing up and spending more time with a Golden Retriever at the park, and she’s been encouraging it.

Some people would probably be offended, or humiliated that their girlfriend was treating them this way. I couldn’t disagree more. This is our game, our way to explore life and the world around us. Lily has told me about the years - decades or more - that she has spent in all kinds of different forms, and now she offers me this chance to be and do literally anything. How could I say no?

That sentiment, “how could I say no?” carried me through a lot of my dog actions. It let me just do what came naturally. I didn’t care what people thought of me - after all, that was just dog me. I could become any other kind of dog, or a different person, or anything else. It was freeing.

At the park, Lily ruffled my fur and said something. She sounded cheerful and chipper, and her eyes waggled. Presumably, she was wishing me good luck with my new friend, and I couldn’t help but agree. A small part of me felt weird, knowing that my girlfriend - no, owner - would be watching if we did anything, but that was normal for dogs, so I accepted it. As Lily unclipped the leash from my collar, I felt the tingle of a change. She winked at me and leaned in and whispered. The words were just random sounds, but I knew what happened.

I was in heat.

Within moments, every male dog in the area would know how badly I needed them. And I needed them badly, without a doubt. I staggered off, looking for the Golden Retriever. At least he could help sate my needs. After a small search, I found him, tucked away in a corner of the park. He greeted me immediately, sniffing my rear as did I to him. He caught a whiff of my new scent, and visibly became excited. Within moments, we were making love like wild animals, and within moments after that, we were done. It felt… different, than my time with Lane. More utilitarian, more practical. It was better for that, in some regards, and worse in others. A strange, interesting experience.

I knew enough about dog anatomy to stay still after we finished, but my new mate didn’t want to. He pulled away, and somehow, there was no resistance. I looked, and ‘he’ was now a she. I was baffled, confused, concerned. Was I losing my mind? Slowly, the Golden Retriever stood on her hind legs, and then turned in Lily, fully clothed. She pet me gently, clipping the leash to my collar and adjusting my mind again.

“How was it, Lady?”

Lady, the name she had given me as a dog, and was engraved onto my tags. Belatedly, I realized I could understand her, but more importantly, I could love her again. I didn’t have all of my human faculties back, but she knew what I meant when I jumped up and licked her face half to death.

“Down! Down girl!” She laughed, wiping off her face as I obediently hopped down. My tail wouldn’t stop wagging. My furry paramore had been my girlfriend; this revelation was a massive relief. She tugged the leash gently, and I trotted alongside her toward our home. Did this mean I was going to change back soon? I could feel Lily’s mess dripping out of me, and I hoped I’d be cleaning up with human hands rather than licking cleaning.

“Now,” Lily started up once we were out of the park and away from people. “You really are in heat. And for the first time, I wasn’t shooting blanks into you.” My heart raced faster than I thought possible, and I stopped walking. Lily crouched down next to me. “I can make it so you can’t get pregnant, though we need to make that choice now. If you get pregnant, I can’t change you at all until after you give birth. I completely understand if you don’t want to do this.”

Lily offered out her hand. I knew all I had to do was press myself against it and she’d fix this. But at the same time, my mantra came back to me.

How could I say no?

I ducked away from her hand, and started sprinting toward our house. In the process, my girlfriend - no, owner, at least until I gave birth - was nearly pulled off her feet. Laughing, she ran after me, knowing she’d have to start preparing for puppies soon.