Erika's nipples were painfully erect and pointing under her shirt! She felt growth pains as her nascent breasts started pushing against the fabric, expanding.
"Aah!" she screamed, "wha... what's happening to me!" She jumped in surprise and clenched her fingers, accidentally hitting the nozzle again. Its content sprayed all over her belly down to her crotch area. "Oops... oh no..." Her body started tingling and she let go of the bottle, falling back on her bed. A spasm ran through her body. She passed a hand over her tummy; small nubs were poking against her shirt. She removed it to free her constricted breasts, looking down her body.
Round perky breasts were heaving along her breathing motions; underneath, three rows of longer, more animal-looking nipples had appeared on her belly. Brushing her fingers against them Erika noticed how soft and supple to the touch they were. On that instant she felt a pressure as something shifted against her groin; the sensation was pleasant. "What now!" she wondered as she quickly cupped her groin with her other hand.
She could clearly feel an unfamiliar bulge in her panties. She pressed hard, trying to conceal it, and it started to stir and harden... "No! That's not it..." she protested, pressing harder to push the thing back inwards. She only elicited a delicious throb as an answer, and the thing started growing more, straining her panties. With a sigh she removed her skirt and underwear and sat on her knees to examine her crotch, fully naked.
A thick, moist, canine penis was poking out of a furry shealth and twitching lightly. She recognized it for what it was immediately because her dog at home sported a similar member. "I am... a male doggy now?" she asked herself as she reached under the sack of small, firm furry balls that had sprouted down there to check if her genitals were gone - and they were. All that was left were male canine parts. Yet her breasts were still present and had grown as though she was older, and her... other nipples looked pretty female.
The touch of her hand over her new equipment sent another tingle of pleasure through her body, and her animal penis became extremely hard. She felt herself blush and started panting. "What's happening to me? This feels good..." She wrapped her right hand over her moist member and rubbed it gently to reproduce the nice feeling. She could feel her... cock? throb increasingly more as she would go faster, and a transparent substance leaked from the tip and over her hand, dripping on her thighs and some on the bed cover.
Erika moaned lightly, unvoluntarily rocking her hips back and forth a bit as she smeared the fluids down her length and pressed her cock more firmly in her small grasp. She barely registered that her other hand was navigating her chest and belly, caressing her sensitive nipples and tugging gently on them; it added to her excitation. She noticed a knot expanding generously at the base of her cock as a strange pressure was slowly building inside her, somehow urgeing her to jerk faster.
Suddendly, she provoked a surge of pleasure with another delicious motion of her wrist, and she felt her balls tighten against her body as thick ropes of fluids started shooting from the tip of her penis, splashing on her knees as well as the bed cover. "AAah! Gnnh!" she screamed in exctasy; she immediately grabbed her pillow to press between her legs in an attempt to contain the geyser of semen that was escaping her. She hugged it and humped hard, her cock throbbing wildly against it with no sign that the eruption had stopped. She lost herself in the moment, bending forward, bucking her hips forcefully against her bed's pillow.
After a while her orgasm subsided. She fell back with a sigh while the last load of semen lazily dribbled out and down her member; her dog penis softened a little and partly retreated into her sheath. She could hardly believe how incredibly good all this felt! But what a mess she had made... Her thighs, belly, and breasts were covered in thick white goo, and her pillow was soaked! There were wet spots all over her bed cover. She felt simultaneously embarassed and incredibly proud of herself, somehow.