Their post-coital relaxation was abruptly disturbed by the sound of the front door to the house being opened and closed and the voice of Mary's mother, Penny calling out her daughter's name as she came down the hall towards the kitchen.
Mary hissed "Shit! It's my Mother!", her first instinct being to panic in case Penny would flee at the sight of two Demons in her daughter's house and call the authorities. Succubi will be Succubi however and this was rapidly followed by the thoughts associated with Penny's lucious body. Still a youthful late 40s, her Mother had kept herself in fabulous condition with a rounded backside that looked magnificent in a pair of tight jeans and a pair of tits that rivalled even the swollen crimson breasts she herself now sported.
The door opened and Penny stopped in shock, eyes like saucers as she was confronted with the sight of two naked red Skinner creatures from Hell. She was about to open her mouth to scream when Mary's hands caught her by the wrists.
"Mom! MOM! It's me, it's Mary, look at me."
Penny was still staring at Lorna's enormous penis, wet with his ejaculate and Mary's cunt slick before her vision jerked back to Mary. A crease of recognition ran between her eyes as she comprehended what had happened here. "And this...this is Lorna." Mary continued.
Penny's eyebrows shot up. "Well...I always knew you two were close.but I never dreamed..." This was at least a tacit acknowledgement of the fact of her daughter's queerness, Mary having come out to her Mother as Pan several years previously. Shock, however, began to turn to anger. "What have you two been up to? How....what...what have you done to yourselves?" She turned one hand over, the absence of anything rubbing off on her skin convincing her this wasn't just some body paint and prosthetics that her daughter was wearing.
She was directed to the kitchen table where the vials box still lay open. "They were delivered anonymously this morning. I thought it was some kind of weird prank at first but...as you can see. We...kind of got carried away as you can see. But, there's a human one, we can turn back whenever wish".
"You can? Well then...that puts an interesting spin on matters. Though I am still shocked at your recklessness young lady". This produced a humph of irritation from Mary, given Penny was hardly the model of saintly Motherly behaviour. Mary was all too aware of just how active Penny's sex life was for example. Curiosity piqued, Penny began picking through the options. Ranks of animal categories, farmyard animals, reptiles, insects, birds. She had read her fair share of erotica involving hucows and the like, but she kep going deeper, cycling the draws until her gaze alighted on one in particular, and she drew it forth from its velvet lined space, the label on which read 'Tentacles'.
She held the test-tube like vial in front of her, swirling the liquid within it, which was an only black compared to the red which the others had consumed. "Bottoms up" she said and drank the stuff down.
"Mom, you should probably get undressed before.." Mary said, as Lorna came up behind her to take her in his arms, though her entreaty came too late. Penny winced once and then staggered forwards to brace herself against the kitchen island as her changes began.
Colour began to drain from her skin, her veins running from green to black and her tanned complexion turning very decidedly grey. Her blue eyes became glassy pupiless and white-less black, the taint of the vial swirling into them. She moaned, the human sounding voice ascending into a reedy screech of unnatural pleasure and arousal. Penny's long, blonde hair darkened, through brown to black, becoming lank and greasy.
The gurgling, undulating noise she was making ascended an octave as her clothes began to burst apart, revealing the erupting flesh that came from her shoulders and her back, each one a thick rope of greasy flesh. One began to wriggle from the top of her buttocks, thicker and larger than the others. She tore away the rags she was now wearing, the full horror of what she was turning into becoming apparent.
One slimy tendril slithered over her shoulder and coiled round one breast and between her darker grey cleavage, as it began to squeeze, constrict, and stimulate. Another which has emerged from her full hip was wound round the top of one thigh, continuously shifting.
"Mmmmmmm yess...Look at meee! Ohhhhh! Hee hee...time for some funny!" she hissed as her tail tentacle slid up between her legs, coating her buttock crease and vagina in a layer of slippery slime. Half a dozen other tentacles swarmed from her back and shoulders and with an exclamation of glee, every one, including the thickness questing up between her legs burst open at their ends into tips which made very close approximations of the heads of penises, immediately beginning to leak the Tentacle woman's oozing grey fluids.
A pair of sex demons needed little encouragement, as they led Penny to the living room with it's large floorspace with various throw cushions, the blinds closed to prevent prying eyes. Penny's entire body was by now clammy and slimy to the touch, her pores wicking the corruption from within.
They eased down onto the rug, Lorna's erextion returning with vigour as Mary licked her Mother's grey nipples, making her large tits jiggle lewdly. Penny made a sing-song moan as she stimulated her cocktail with one hand. Mary grinned, showing sharp teeth as she splayed her demonic cunt petals wide, showing the already creampied folds, inviting her Mother within.
Penny sent her tail forth, easing into her daughter's hole, her breath coming in rasps of exhilaration and then, more confident, she began to feed long inches of tentacle into her offspring. Lorna moved in behind her, hefting hia s massive shaft and easing Penny's appendage gently to one side, he impaled her, all three of them making inhuman noises of lust.
Penny screeched with wild abandon as she sent one of her slimy ropes backwards, finding the Incubus' arse cleavage and sank between his butt-checks to demand entry to Lorna's sweaty anus. Simultaneously she presented the dribbling cock-headed tip of another to Mary's mouth. It belched it's thick, grey pre-cum over the Succubus' black lips before it oozed between them. Mary's throat made a glucking noise as it made its way down her throat.
The three creatures the three humans had become writhed and pulsated as a mass of flesh, heaving with each desperate flexing of their bodies when one of them would thrust into an orifice, tentacles constructing breasts of both women, teasing Lorna's scrotum. Lorna grunted as he thrust hard into Penny from behind, seeking the towering pleasure that he had experienced only a short time ago by cumming inside his demonified best friend.
The tentacle woman could not resist the seductive pleasure of violating every squeezing warm home for her body's strange appendages. No obscenity was too great in the service of her pleasure now. Both Lorna and Mary's rectums were impales, along with Mary's vagina and mouth. She shrieked as the pressure in her ropes built and built, driving her to dig deeper in search of the glory that lay beyond.
When she came, it was like she was being driven out of her wits, as every penis-like tentacle she owned gushed and hosed it's seed inside the bodies of her two lovers. Penny's cum pulsed down Mary's throat, the tentacle flexing as the thick glue of her spunk was delivered until it drilled from the side of the Succubus' mouth.
The sun had risen by the time their separated from one another. Mary smoothed a red, clawed hand over her abdomen, slightly distended by the volume of Lorna and Penny's semen that had been injected into her womb. "The child that will grow in my belly will be monstrous indeed my loves" she purred. The fact that her own Mother could easily be the parent of that child no longer entered into her concerns.
"What now my Daughter?" Penny hissed. "Surely you do not mean to give up these bodies with a whole weekend of possible pleasure to enjoy?"
"Oh no Mother dearest, I have big plans for the next few days." The Succubus replied seductively. "You are both going to love them" she finished, as she leaned firstly to one side to kiss Lorna, and then her Mom, followed by the gleeful, wicked laughter of the trio.