The street lamps were coming on as Mary wandered from the bathroom to her bedroom where she kept a full-length mirror. The sight of her naked, demonic body made her audibly gasp as she turned this way and that, admiring the red, curvaceous, yet visibly athletic form, flexing her wing pinions with their strange, new muscles.
Her clawed fingers went to the dark, almost black peaks of her crimson breasts, which immediately sent a shock of pleasure through the Succubus' body, her nipples immediately hardening and moist heat forming between her legs. She moaned, sliding a pair of red fingers down to her petals, sliding them into herself with a glorious sense of sexual tension. She surprised herself as a soft growl escaped her glossy black lips, one side of her snarl curling upwards to show her sharp teeth.
She retracted her digits, bringing them to her mouth and suckling on the musky tasting slick from her cunt before purring "Mmmmm...I think I like being like this." Proudly naked, she returned downstairs to where the box of vials stood, still open on the kitchen table. As promised, the Succubus vial had refilled itself in the time she had been undergoing her transformation.
She perused the rest of the vials, many of them, perhaps a hundred or so, in neat rows with golden lettering. She wondered what would happen if she took another now - would it replace the current effect? Or add to it? Did her own will have any say in the matter?
She needed to talk to someone regarding all this, and beyond that, she was becoming acutely aware of the savage, sexual hunger that was undoubtedly her Succubus blood taking charge. Her thoughts turned immediately to her best friend, Lorna. She started for the front door, before she checked herself. She couldn't go walking round the streets like this, there would be pandemonium.
She raced upstairs, and pulled up the sash window in her bedroom and with some effort, crawled out onto the half-roof below, curling her toe claws on the edge, she pushed off, beating her barbed, leathery wings to take flight. At first, it was difficult to get her bearings from above, but picking out a landmark, she made her way towards Lorna's neighbourhood, and eventually, zoned in on her house. She could see her best friend moving round in one of the lit, upstairs rooms, and she floated down to perch on the sill of the open window.
Lorna - clever, sensible, practical, Lorna, dropped the sweater she was folding as Mary unfolded her monstrously beautiful body into the room. Backing away, she was about to scream until she stared, dumbstruck at Mary, her sensible brown bobbed hair gently swinging, her sensible bosom heaving and her sensible calves trembling.
"Mary? Oh my God, Mary is that you?!"
"It's me. Or rather, a new, better me" she replied in a sultry tone, closing the distance on her friend until she could slide her hand against the human woman's forearm, transmitting a taste of the Succubus' intense sexual arousal, making Lorna moan deeply. When Mary's dark lips met her, she surrendered to it, tentatively at first, and then eagerly.
The strong arms of the Succubus took Lorna into their embrace, up and out into the night, until the pair of them were deposited back into Mary's kitchen, with the chest of vials at their disposal.