In the middle of all of these vials Mary spotted one marked "Succubus", with a red picture of a very curvy woman with wings, horns and a tail.
She was absolutely fascinated with the idea of becoming a demon and took the vial up in her hands to look at it more closely. "Aw hell...why not?" She giggled as she uncorked it and took a quick whiff of the red, bubbling liquid. Strangely, the liquid was hot, smelling a mix of spices, sulphur and something else. It made Mary’s head spin as she felt her panties moistening and her nipples getting hard under her bra.
“Mmmhh, at last if it didn’t work I could use it as an aphrodisiac” she giggled as she downed a third of the vial and then put it back with the others.
The effects were quick. Mary’s breath quickened as she felt her body growing warm and flustered. She quickly removed her clothes as beads of sweat were all over her body.
She moaned loudly as thoughts of her morality and convictions drifted from her mind. She licked her lips as she thought of what she could do, alone in the house with these vials.
Alien sexual thoughts invaded her mind, visions of herself going down on guys and girls, of multiple penetrations and timeless orgies, being forever young and sexier than she could ever dream.
“Yes,” she groaned, “fuck yes.”
Opening her eyes, she stared at the large mirror in front of her, noticing that her eyes were now a burning red, glowing lightly like they were made of fire. Raising her hands in fron of her, she watched as her fingers were developing a red tint, and subtly changed in shape, each of them now tipped with longer, thicker and slightly curved nails, colored a deep black. Mary’ lips were growing into a sensual pout and becoming as black as her nails. Her tongue seemed longer and thinner, looking more black than pink.
She felt another surge of power overwhelming her, and she panted with rapidly fleeting exhaustion as her thoughts turned quickly back to sex and her fingers shot to her nipple and clit. She barely noticed as her small B-cups breasts began to grow, turning into a pair of small D-cups in seconds! She groaned through slimly sharper teeth as she felt a pulling sensation coming from her spine as something tried to force its way out of her skin. She howled from the mix of pleasure and pain as a small, red tail tore out of her spine, tipped with a bulbous spade.
Within a minute, Mary began to feel the lust abate and her mind starting to clear. Staring at herself in the mirror, she was amazed by her new beauty. Many of the flaws she though she had seemed to have disappeared. Not fat at all, she now had a tight body, showing a muscular, yet still feminine physique. Her breasts stood firm on her chest, bigger than she remembered them. Mary moaned lustfully as she experimentally pinched her firm nipples, more sensitive than ever. Her complexion was clear and flawless. Her once pale skin was now slightly reddish, as if she stayed too long under the sun. She smiled at her reflection, noticing her sharper canines and slightly pointed ears and the two small bumps on her forehead.
“Mmmhh, perfect” she moaned as she pondered what to do next.