Transforming into a slug

“Damn, I really needed that.” Lilith moaned, cupping Hayley’s tits. “It took a lot of energy to make you one of us.”

“Decided what to do next yet?” Gwen asked, looking back down to the drained men on the floor.

“That’s what I was getting to.” Lilith said. “You needed that energy just as much as I did. Now that we’re recharged, we can have some more fun.”

“Such as?” Gwen asked, getting excited. After feeding, she felt incredibly empowered, like she could do anything.

“It’s time for you and me to get an upgrade.” The older succubus said. “But first let me teach you how to do a bit of transformation.”

The two succubae, still in the naked bodies of Hayley and Emily, sat down upon the couch.

“I first learned this trick back in the 200s, when I got summoned by this Roman lady dabbling in Christianity.” Lilith explained. “I was pretty newly formed back then. I didn’t even know I could possess regular humans until I found myself looking out of her eyes.”

“You had to figure out all this stuff yourself?” Gwen asked in disbelief.

“It’s surprisingly simple.” Lilith said, twirling a strand of black hair around her finger. “Once you do it the first time, it just feels natural. Even these days, I’m still figuring out what I can do.”

This made sense to Gwen. Already she felt powerful, eager to see what else she could accomplish. Emily’s skin felt nice, very nice, but she wanted more. “So, what’s this trick?” She asked.

Lilith smiled. “Close your eyes.” Gwen did.

“Focus your mind. Picture a tentacle, a greasy, filthy slug. It’s got no eyes, no mouth. Just a small, foot-long body. Can you see it in your head?”

Gwen nodded, her eyes still closed.

“Good.” Lilith said. “Now you know the spell already, don’t you?”

Gwen opened her mouth to question what she meant by that, but she realized Lilith was right. The words were there, in her head. Somehow, she already knew them. She knew exactly what to say. The spell came to her as easily as though she were reciting a nursery rhyme.

She spoke, but the words came out not as the human Emily would say (or even understand), but in a dark, disturbing, utterly demonic chanting—the true voice of the succubus, in the language of the Underworld.

“You can open your eyes again.” Lilith said. Gwen, already feeling tingly, looked to see the possessed Hayley looking very pleased. “Now get ready, things may get a little weird!” Before she’d even finished that sentence, Gwen’s vision began to go dark, her body starting to shake against her own will.

With the darkness, a feeling of entrapment slowly descended on Gwen. She increasingly became restrained, walled in, cut off from the world. She became aware of a tunnel before her. A way out? She moved towards it. She didn’t feel legs underneath her. Instead, it felt as though her whole entire body was moving all at once. Was this…?

She came out of the tunnel before she could answer the question. She couldn’t see anything, hear anything, or smell anything. But nevertheless, she could sense a presence before her. It was incredibly strange, but she could tell that the presence was in the form of a woman.

“Ah, there you are.” A voice entered her head. She couldn’t hear her traditionally, but she it was there anyway. It was Lilith, not using Hayley’s voice, but her own demonic timbre.

“Lilith?” Gwen asked. “What’s going on?”

“What do you think?” Lilith answered. “The spell worked. You transformed. You just slithered out of Emily’s mouth.”

“This seems like a bit of a downgrade.” Gwen said. Though she could sense Lilith and the environment around her, it was more like one sense than five. “What am I supposed to do as this?”

“There’s an upside.” Lilith explained. “Not only is this the easiest, most energy-efficient form to transform into, but you’re just the right size too.”

“The right size for what?” Gwen asked, wondering what Lilith was leading to.

“The right size to climb into a girl’s pussy.” The succubus said. “Which is exactly what I want you to do with me.”

“Oh, shit, really?” Gwen asked. “But wouldn’t that…”

“Don’t worry, you can’t possess me.” Lilith reassured her. “But you also can’t go around slithering around like that for very long. I’m gonna carry you to a new host.”

“Why do I have to be in your pussy, Lilith?”

“Because it’s fucking fun, that’s why! You’re like a living, moving dildo. Besides, it’s good practice.”

Gwen paused. “…Is she gonna be hot? My host?”

“Oh you.” Lilith laughed. “Of fucking course. Who do you think I am?”

If Gwen had a mouth, she would sigh in resignation. “Here goes nothing…” She moved towards the mass she could sense as Hayley’s body. She could tell that the girl’s legs were opening for her. She could also sense the opening between them (even better than she could sense anything else), the space that was her destination. She moved quicker now, getting the hang of her new body’s locomotion.

“Come on already, we don’t have all night!” Lilith voice in her head exclaimed. She could tell the succubus was masturbating already.

Gwen managed to raise her ‘head’, encountering the entrance to Hayley’s canal. She gently probed further, feeling the slick walls part and envelop around her.

“There we go.” Lilith said, her ethereal voice clearly becoming pleasured. “She’s all ready for you.”

Encouraged, Gwen pushed in. She slid herself forwards, inch by inch. It felt strangely comfortable inside the girl’s vagina, similar to the way she first felt when she was sealed up within Emily for the first time. The walls briefly contracted around her, a pulse of pleasured energy permeating the air.

“Did you just cum?” Gwen mused.

“I’m usually the one doing the body invasion.” Lilith’s voice returned. “Forgot how good it felt for something to be crawling into me.”

Soon, Gwen had pushed in as much as she could. She felt the last bit of her become enclosed in the warmth of Lilith’s human host. “What now?” She asked.

“Now, you can sit back and relax.” Lilith said. “You’ll know when it’s time.”