Erika tripped from the surprise and fell into the bushes. Her husky dog Max was there, repeatedly licking his own genitals. What confused Erika was that they looked... different. It was as though his dog penis had almost completely disappeared - he looked like a female dog with a tiny boner! She remembered that, the night before, Max had licked the strange goo off the bathroom tiles.
Maybe this was all her fault. Maybe her goo made this happen.
Max looked up to Erika and jumped on her happily, whining excitedly. At first he was simply licking her face and wagging his tail but soon he started dry humping her as she struggled to get up on her feet. She felt grossed out, although at the same time she could tell her groin was starting to stir again...
"No! Go away Max! Naughty dog!"
She jumped back on her feet and escaped in the living room, shutting the bay window behind her to keep Max out. He scratched at the window, up on his hind legs, his genitals fully exposed. He looked like a female dog in heat, though his member was not totally gone - or had been returning, Erika couldn't tell for sure.
She was very confused by the arousal that had taken over her from the sight. "Why won't this thing leave me alone?" she whimpered as her length refused to shrink back into her canine sheath. An electric spasm ran through her body and the hair on her arms grew thicker, nearly fur-like. She could feel her ears taking on a more canine shape, too.
Then, she got an idea. Maybe, maybe she could turn her privates female again if she tasted enough of the goo, too. If that worked on Max, maybe it would work on herself. That way she wouldn't have to hide from Melissa or at school again. She would be normal.
She just had to collect enough goo.
Erika bolted to the kitchen to look for an appropriate bottle. Finally she got her hands on one of the proper size and shoved her penis through the opening, not without some difficulty. No way she would make a mess with this on, though! She started working the bottle around her member, humping into it, pinching her teats with her remaining hand. She could feel the familiar churning build in her canine balls. Pre was dripping into the bottle already. It was working!
She felt her member harden from the stimulation, and she jerked more firmly against the bottle's neck. However soon her movements became constricted by the swelling knot at the base of her penis... She tried to pull out of the bottle, but the knot had grown too large to get out! And the rubbing only made the situation worse. On the bright side, a lot of fluids were oozing out of her member's tip...