Her thighs trembled and her shorts darkened with her own fluids as the forceful sensation of having her throat bulged out with cum rocked her.
Above her Kayla had finally noticed that something was wrong and had paused in her bouncing. She stared at the vulpine whose muzzle appeared to be buried in a pile of tentacles which in turn were buried in her sister's stretched out cunt.
It was when one of the tentacles that rose up from below found it couldn't fit in the stuffed full hole that she began to have a little concern. That concern turned into fear as the tentacle turned and seemed to look upwards at her.
"Uhm, h-hi?" she whispered, as the tentacle bobbed and 'stared' at her. The tentacle, glossy, white, it was just like...
She hesitantly raised a hand and waved at it.
The tentacle tilted to the side and she swore she heard a very muffled SQUEEE! Sound from somewhere. She didn't have long to ponder just what she had heard however as the tentacle suddenly surged toward her. She cried out and tried to scramble away but the tentacle grabbed her by the ankle and hauled back on her, dragging her backwards until she was nearing her sister's tail. She looked down her body in alarm as several more tentacles rose up from the nest that was her sister's pussy and grabbed hold of her legs, forcefully spreading them as one thicker tentacle snaked up toward her shorts.
"W-wait, hold on now!"
A muffled shouting came from where Vivi's head was buried, it sounded sort of like "It's too late!"
The thick tentacle slapped against the fabric of her shorts and pressed itself down against her muff through the cloth. She squirmed under the pressure, completely helpless beneath the powerful tentacles. They could out power Vivi, so a Classless otterkin innkeeper was putty beneath their ministrations.
"Vivi! P-please! You've got to get control of it!"
The fox girl's shoulders seemed to slump and then resignedly she applied her strength and pushed against Lily's butt cheeks. Slowly her head schlurped free from the grasping writhing tentacles. Strands of cum inches thick drooled from her muzzle connecting her to the nest in cummy upside down arches.
She coughed and a slurry of cum washed from her lips. She looked up at Kayla as she cleared her throat.
"I can't stop Wummy, it's too strong. But don't worry I think it's a nice slime."
"You NAMED it??!" shouted Kayla in horror as a tentacle dipped below the hem of her shorts.
"Oh gods, these white tentacles, this is the thing Flora gave birth to! You've been hiding it inside of yourself! That's where your larger stomach came from!"
Vivi turned her head slightly abashed, her cheeks reddening as white continued to slowly ooze from her mouth. A river of cum was now flowing from Lily, pouring over their bellies in an obscene waterfall.
"I didn't have a choice," she muttered, "it was just scared and wanted to run away and it came to me for safety…"
"And this is scared???"
"Ah, no, I think it just likes girls, like a lot."
"Oh gods!" said Kayla as her shorts were ripped apart by the tentacle tensing up below the cloth, her bare exposed pussy now visible for all to see.
Vivi bit her lip.
"I - I guess I could ask it. Uhm, Wummy, would you mind- GHURK!"
The slime SQUEEED! inside her as it instantly realised what the girl it was piloting was going to ask for. She wanted to be mouth filled again! Like last time! The tentacle that ripped apart Kayla's shorts turned and with a showy flourish dived into the fox girl's mouth and then exploded in girth, swelling wider and wider, stretching the vulpines mouth wide and then pushing roughly down her throat, massively distending it.
The reaction Wummy got confirmed its guess. Girl cum spritzed from between Vivi's thighs as her hips shook and trembled, the rough usage of her throat instantly turning the fox girl into a mindless moaning slut.
Kayla looked in horror as Vivi was filled with tentacle, her eyelids fluttering as her eyes rolled up.
The tentacle touching up against Kayla's pussy began to swell and to her horror the tip formed more of a rounded cock head shape, then, even worse, nodules began bulging out along its length.
This was decidedly not a good development.
Maybe she could reason with it?