The next morning

The next morning, Erica awoke to the feeling of something wet and warm on her pussy. She opened her eyes and saw Kylie's face between her legs, licking and teasing her clit.

"Kylie?" Erica moaned, still groggy from sleep and the intense sexual experience they had shared.

Her eyes shot open to see Kylie's face between her legs, but something wasn't quite right. Her friend's eyes had changed, they were now a deep, fiery red, and there was a faint glow emanating from them. The sight was eerie but somehow erotic.

"Kylie?" Erica whispered again, but the only response was a muffled moan as Kylie's tongue danced around her swollen clit.

"Oh, Erica," Kylie's voice was different, deeper, and more primal. She pulled away for a moment, her eyes now fully red and her tongue extending beyond what was humanly possible. "I need more of that sweet cum," she said, her voice dripping with desire.

Her breasts had swollen to an impossible size, and they heaved with every breath she took.

Her tongue, now unnaturally long, danced around Erica's clit before sliding back into her pussy. Erica's eyes widened in shock and arousal as she felt the unmistakable pressure of her own cock swelling again. She was both terrified and turned on by the transformation her best friend was undergoing right before her eyes.

"OH FUCK ! Kylie, what's happening to you?" Erica managed to ask through gritted teeth as the pleasure mounted.

"I don't know, but I crave your cum," Kylie's voice was thick with lust as she slithered her tongue around Erica's shaft, which had grown to its full length again. "It's like nothing I've ever tasted before," she said, her eyes still glowing red, the hunger in them unmistakable.

"But Kylie, s-something is wrong ! You're changing," Erica said, trying to push her friend away, but the pleasure was too intense. Her cock was fully hard now, and she could feel the pressure building again.

Kylie just moaned in response, her humanity seemingly gone as she took the entire length of Erica's cock into her mouth, her eyes never leaving hers. She sucked greedily, her cheeks hollowing with every bob of her head. The slurping sounds filled the room, and Erica's breath grew ragged as she felt herself getting closer to the edge.

"Oh god ! FUCK" Erica tried to protest, but her words were lost in a moan as Kylie's tongue swirled around the sensitive tip. The red-eyed, sex-crazed woman in front of her was unrelenting, her hunger insatiable. Erica's cock grew even larger, stretching Kylie's mouth to its limits, but she took it all, her throat bulging as she deepthroated her.

Erica could feel her climax approaching like a runaway train, and she was powerless to stop it. "Kylie, I'm going to cum!" she warned, but her friend just sucked harder, her eyes never leaving Erica's.

With a howl, Erica came, her cock pulsing and spurting jets of thick cum into Kylie's eager mouth. Kylie swallowed greedily, her cheeks bulging as she took it all, her eyes never leaving Erica's. As the last drop was expelled, Kylie pulled back, her eyes glowing even brighter as she licked her lips, savoring the taste of Erica's cum.

Erica lay there, trying to process what was happening, she noticed that Kylie was still changing. Her body had become more voluptuous, her curves more pronounced. Her skin had taken on a faint, unearthly sheen, and her plump lips looked fuller and more inviting than ever before. When she spoke, it was with a seductive purr, her words dripping with lust. "I need to taste it again," she said, her tongue flicking out, splitting down the middle as she licked her lips.

Kylie's eyes remained fixed on Erica's cock, her pupils dilated with desire. She began to crawl up Erica's body, her movements fluid and feline. Erica felt a strange mix of fear and arousal as Kylie straddled her, her cock still hard despite her recent orgasm . "I'm going to make you cum until you can't take it anymore," Kylie whispered, her forked tongue snaking out to trace Erica's neck. "You're going to fill me up so much that I'll be leaking your sweet cum for days."