(Remember, this is a female TF)
It's like I'm being tickled. Something is teasing my skin. Taunting it into a change. I lift my arm and see short tan hairs poking through. The feeling spreads from my forearms to the rest of my body, starting with my neck and chest. The hair isn't long, but some of it is darker in very secluded areas. Almost like spots, but not as defined.
"Fur growth starting on upper body. Quickly spreading. Pigment is generally light. Darker spots have yet to fully develop." the voice says.
I start to panic, my imagination thinking of the worst possible scenarios for what will happen next. I dart my eyes around looking for an exit. But the only things I can see are metal walls. No means of escape.
"Subject experiencing increased heart rate. Stimulation of pituitary glands beginning. Growth hormones will soon flood body."
"Growth hormones?" I repeat, before doubling over in pain. It feels like something is repeatedly punching me in the gut. I whimper in pain and wait until the feeling stops. Then I wish it hadn't.
As the pain dissipates I can feel something unnatural touching the back of my thigh. I fearfully look, and to my horror there's a hairless, three inch tail sticking out of my backside. I choke back a scream, and reach out to make sure I'm not hallucinating. I pull on it, and I wince when my skin protests. It's real. I have a fucking tail.
"Subject's tail has begun forming. Growth hormones effecting spine and chest now."
I whip my head around to look at my chest. The voice was right, my chest was getting bigger. What little clothing I have on starts to tear as my breasts inflate like party balloons. I'd like to say I had a reasonably large bust before (something close to a D cup). But this is just ridiculous. I don't think I could say how big my chest grew. Somewhere between an F or G would be my best guess. My nipples grew in tandem with the rest of my chest. And to make matters worse, the skin of my nips was changing as well. Once soft, feminine skin became hard and dark brown, if not black. They stuck out like two black marker caps. I was mortified.
"Hair growth continues on back." The voice said next. I look over my shoulder to inspect the damage.
The familiar sensation of hair growing through skin is indeed my back now. I can eve see more dark patches appearing. An entire line of dark hair is running down my spine. I imagine it goes all the way to my neck. When I go to touch it, I find it to be longer than expected. But the more I stroke it, the less concerned about it I am. In fact I can't even remember why I was so upset in the first place?
If I didn't know better, I'd think I was wearing a sweater. A very thin, fuzzy sweater. That does nothing to hide my breasts or thick nipples. But it's oddly comforting. I feel safe, and warm. But something is missing.... what...?