"Ooohhhh!" I moaned as I felt another orgasm building. But something was different this time. My clit seemed to be even more sensitive. I carefully rubbed it with my paws, sure to keep my claws out of the way.
As I rubbed it, my clit swelled larger and larger. Until it didn't look like a clit anymore. It became so large that it made a very distinct outline as it pressed against the crotch of my underwear. I marveled at my new changes. That little pleasure button turned into the head of a cock. A huge cock, the head was as big as my fist. The shaft began to extend from my body, and soon enough I was stroking my new cock. I also noticed that despite my growing a cock, I still had my pussy. It had just shifted backwards, closer to my asshole, to make room for my new additions.
It didn't take long for my cock to reach gigantic proportions. It tore through my underwear, not that I cared much anyway, flopping forward and then becoming painfully erect. It had to be at least a foot long. The skin was so thick and dark, like an animal's cock. I saw there was a bunch of skin collected around the base. Furry, and very much attached to my cock, it took me a while to realize it was my sheath. That should have freaked me out, but it only made me hornier.
"Male hormones taking effect. Phallic growth steadily increasing. Subject shows increased arousal, and manual stimulation has begun." Mira said.
"Oh, yes! More! More!" I cried out as my strokes became faster and faster. Two new bulges appeared at the base of my cock. My testicles. They were wrapped in a furry sack, much like my cock. As soon as they dropped I came. Thick ropes of cum flew forward. They mixed with all my female spunk. I inhaled deep breaths, the smell so intoxicating. My breasts heaved, still dribbling milk down my front.
I lay on the floor for a moment taking in my reality. I was being turned into some sort of herm-breast. And I was loving every second of it. My thick cock had retreated into its sheath, and I stood up. My balls swayed back and forth, and I felt my pussy clenching and unclenching beneath my asshole. It was so erotic, my cock quickly extended again.
This time, I noticed that it had gone through several more changes. The head was even bigger, and took on a distinctly equine shape. The skin closer to the head was pink, while the majority of the shaft was black. I had a horsecock. As a wave of pleasure hit me, I reached around to probe my cunt. I knew what to expect, but was still mildly surprised to find my pussy was now a mare pussy.
It was so big, I knew I'd have no problem taking a stallion. My tail wagged as my paws began kneading my pussy lips. They kept clenching over and over, begging for a cock to fill them.
"I... I need... COCK!! I wanna get fucked!" I screamed. My paws dove into my gained snatch. My horsecock was held against my torso, and as I continued to stimulate my pussy I bent my head over to lick my cock. The pre cum tasted so delicious. Sweet almost, but very salty too. I wanted more. I needed more. I came again, sending thick spurts of horse cum into my maw. I swallowed as much of the stuff as I could.
And as it went down my throat, I felt myself changing again. My face felt funny. Kind of hard if that makes sense. I took my paws out of my horse pussy and brought them up to my face. They smelled incredible, so musty, but I was more concerned at I could see my nose stretching out in front of me. My nose blackened like my cock, becoming very animalistic and fusing with my lips.
I had a canine muzzle now. And it only made me that much hornier. I could smell everything so much better now. And the scent of my arousal and the self-induced orgasms was overwhelming. I was possessed by lust. The robotic voice was saying something else, but I was too consumed to hear it.
I heard a door opening, and saw a mirror approach me so that I could get a full picture of what I had become.