Mary takes showers the way some people add math on a calculator. She had one way she did it...and she did it without deviating. Clothes in a small pile beside the sink, jewelry on the counter--and Mary always wore earrings to bed--shower as hot as you can get it without scalding yourself.
She soaped up from the top down, scrubbing her arms, neck, upper chest and upper back with a loofa. She scrubbed until she felt like her skin was about to bleed, then stopped and moved lower. She also scrubbed THERE until she felt like something was about to explode...but it was a different kind of explosion. Mary felt that having one good orgasm was as much a part of showering as anything.
Then she got to her lower buttocks.
She'd been having the tingling feeling all during her shower...mostly at the base of her spine. She hadn't felt worried...and by the time she got down there, Mary was in no condition to care. She had blown it off, first to the shower, then to the orgasm. But now...
Her fingers touched something that felt like wet hair, wet SHORT hair, and silky-fine. And something that was growing out of just above her butt.
She closed her fingers around it, then ran them down the full leingth of her newly-grown tail. It was sopping wet--and still growing. It was only a foot long from base to tip, but as she ran her hands down it the second time, it was longer. Only a few inches, but she could bring it around and see the tip.
It was black and orange, fur matted and dangling misurably from the shower-water. It grew slowly, but Mary could see it happening. The human-pink end would push forward, like a root of a plant. Fur would emerge, first a light brustle, then longer, soft and fine. Mary's shoulder-leingth blonde hair was corse in comparison.
In a matter of moments, the tail was fully grown. She let go of it and half a foot of it lay in the soapy waste-water still left over by her shower's ineffciant drain.
Then she was aware of the tail...and aware of how uncomfortable it was wet. Mary curled it out of the water without even thinking about it...the nerve endings were all installed, the operational paths all working. fine.
She got out of the shower--wild horses couldn't keep her in--and grabbed a blow-dryer and towel. She spent thirty enthusaistic minutes towel- then blow-drying her tail off, fully aware of how good the fur felt to stroke.
When she was done, an incredibly fluffy calico tail was curled around her body, thick, silky fur almost floating in the air. Mary had both hands deep in the fur, amazed at this incredible thing.
It works, she thought. It really, really works.
The vials were real, and as Mary slowly rubbed her new, beautiful tail between her hands, she realized this opened many, many posibilities.