Soon as the three-headed she-beast moved towards Hailey, the latter dashed to the shutter switch. It was a futile effort, because the shutter would still require a bit of time to raise high enough for Hailey to crawl out. She felt something coil around her waist and pull her away from the switch, and resigned to her fate, began to cry.
A sudden lurch and Hailey found herself being nestled into the thing's pillowy chest, halting her sobs. What was happening? She raised her head to look at the thing that used to be Lou. No, Hailey realized, she still is Lou, just by looking at her worried eyes. All three pairs of them. The middle head opened her mouth, emitting a strange sound:
“Aannn” she vocalized, clearly struggling. Her two extra heads whined and huffed. Hailey looked at her, puzzled. What was she, or rather, they? What were they doing? “Nnnnooouu... noo kh-khhghkk.”
Hailey held her breath. No?
“N-no k-kry.” Lou stuttered, in an even tone. She even raised a paw-hand to gently wipe away the few tears on Haley's flushed cheeks. “No khry.” Lou repeated reassuringly, all three heads smiling, her paw patting Hailey on the back gently.
Hailey was dumbfounded, she just didn't know how to respond to this whole situation. But she was going to try. “L-Lou?” she called, the three-headed canine immediately perking up. “Can you put me down? I'm okay, thank you. Hailey asked, pointing to herself and the floor. “Down, please?”
Lou tilted her heads at first, uncertain, but then shrugged (the gesture not going unnoticed by Hailey) and slowly set the human woman down. She started composing herself, but Lou, still leaning forward, took the opportunity to playfully lick Hailey in the cheek, surprising the woman.
“Wuh-HEY! Don't scare me like that, Lou!” she admonished as the offending party chuckled and straightened herself. Wiping the saliva from her cheek, Hailey took a more analytical look at her canine companion. Lou could understand her, that much was obvious, she was also a lot smarter and must've picked up human gestures and emotes from watching others. But why the two extra heads? And the weight gain? God, she was also so tall, standing two feet higher than Hailey.
“Wait a sec... three heads... canine... holy shit, Lou, you turned into a Cerberus!” she exclaimed, a hint of wonder creeping into her voice. Lou just wagged her tail in response, smiling.
Her earlier fear gone, the young woman kept admiring the so-called 'mythical' being standing before her, who in turn found herself amused by Hailey's enthusiasm.
“But why did you suddenly change like that?” she asked, thoughtfully, not noticing her own figure softening up slowly, however Lou did, her heads looking at the human woman with a mix of curiosity, excitement and arousal. “And why did the... sex change... h-happen, too? Mhm...” Hailey tried to think things over, but it was becoming increasingly difficult to do so. A strange heat was spreading through her small figure, and her clothes felt so... restrictive. She was so determined to think that she didn't even notice her height creeping upwards.
“Jeez, this goddamn shirt... it feels so uncomfortably hot.” Hailey grumbled, unbuttoning it and discarding it. It was only then that she realized something was amiss. Were her boobs bigger? They felt rounder and heavier than before, and her bra was beginning to strain her. Putting modesty aside, she removed it too, letting her swelling bosom drop freely, with Lou smiling broadly at the sight, letting loose a giddy whine and drawing the woman's attention. It was then that Hailey fully realized what was happening: her eye level had shot up, and she could actually see it going upwards, seemingly stopping at the level of Lou's nose. Not only that, but her skirt's waistband was digging into her fattening hips, almost painfully so.
Wasting no time, Lou reached down and with a claw, cutting the offending cloth and panties so Hailey could grow comfortably, the latter gasping in relief as the skirt fell off her meatier legs.
“I-I'm... growing...” she panted, a wave of arousal sending shivers down her spine as she piled on weight. She stood fully nude, having also discarded her footwear when she felt something odd with her feet. Patches of fur started growing on Hailey's soft skin as she tried to look over her swelling gut. She could barely see past it, and her feet had morphed into dog-like paws. Under normal circumstances she'd be terrified and screaming, but all she felt at the moment was an enormous amount of arousal.
Lou could smell it, and understanding, came closer. She knew exactly what Hailey needed, and was going to give her the care she deserved while she finished her transformation. Kneeling in front of her, Lou raised Hailey's gut, the former's heads tenderly kissing and licking her navel, slowly going lower as Hailey panted and moaned loudly, pinching and teasing her own nipples.
Her juice-soaked lower lips were so inviting, the aroma so enticing, that Lou took a long whiff before digging in.
While Lou ate her out, with all three of her heads greedily plunging their long tongues into Hailey's needy pussy, she in turn was getting close to her climax and finishing her transformation. Hailey's entire body was now covered in a reddish-brown fur, and her pretty face stretched out, becoming a canine muzzle. A bushy tail grew at the base of her spine, wagging furiously as she felt the end approaching. Two fatty lumps built up on her shoulders, as they widened to make room for her new heads. As the mounds developed features, their first sensations were that on intense pleasure, and their first words were “More! More! MOAARR!!” and “I'm a-almost there! S-so c-close!”
Hailey came explosively, all three of her heads letting loose a feral howl that was surely heard by the neighbourhood, her cum flooding all three of Lou's mouths. They swallowed with abandon, savoring the taste. Hailey's legs gave out, and she fell to the floor with enough force to make everything in the bakery shake. As she lay there, basking in the afterglow, Hailey felt something soft touching her, and opened her eyes to the sight of Lou smiling happily at her, her massively fat body cuddling up to her on the floor.
The two stayed like this for a while, resting in comfort, before Hailey spoke up.
“Y'know Lou, maybe being a Cerberus gal isn't so bad.” her middle head said, as she pat her rising belly. “It's like I'm a big teddy bear, all warm and cozy.” spoke Hailey's left head, now rubbing her gut slowly. Her right head just whistled and licked her lips, full of lascivious intent, ogling her enormous bust as well as her companion's. “A big, sexy bear... and one that still hasn't gotten a taste of YOU, love.”
Lou just let out a yelp followed by a fit of giggles from her three heads as Hailey turned and crawled around her, Lou spreading her legs and lifting her own gut so Hailey could access her own moistening nethers...