"I don't consider it a distinct creature. It's part of me. Like moving my arm. And I can sense every inch of it. Wait… hold on." An inner intuition motivated her to try something. As if her new biology urged her to explore itself. Maya focused on one particular spot along the tentacle, about one meter away from her hand. Precisely there, a second tentacle branched off like the root of a tree. The offspring wasn't thinner nor less controllable than the tentacle which kept crawling along the wall, which in all had reached about ten meters by now. Again it ended with an artichoke-like bud and the squelching sounds doubled in volume.
Priya stepped back a bit. "This is so fucking eerie. Are you doing this?"
Maya nodded. "I think the tentacles can branch off everywhere." The second stem hadn't extended half a meter when it replicated itself again. This time, three tendrils forked off from the same inch and extended in different directions. Counting five green wiggling appendages already, Maya felt confident that she long hasn't reached any limit. Her sexual stimulation grew with each new inch, prompting her to keep going. She wondered what would happen if she willed dozens more tendrils to sprout, just out of curiosity.
Priya screeched as more than half of the room suddenly got filled with Maya slippery, squirming and frantic tentacles. The sounds they made as they slithered around each other reminded of a huge body of viscous slime being dropped from great heights. They knocked over furnitures and decorations, covered their bed entirely and pilled up on the floor. Priya already eyed the door when the entire mass of alga-like eels stopped moving at once. Not one tendril among hundreds dared to twitch or make the smallest sound.
"Ups," Maya giggled, struggling to contain her intense arousal. "That's… a lot. But I'm still in control. Don't worry."
"How the fuck is that even physically possible?" Priya shouted. "Where're they all coming from? This doesn't make any sense at all!"
The tentacle-girl shrugged. "Dunno. But fuck me if this doesn't feel amazing. Like… imagine having a hundred G-spots stimulated at once."
"Is that why you're so chilled about this?" The dizzying oroma of the tentacles was overwhelming now. Priya assumed that they must spread some sedative, alien pheromone since she had calmed considerably and now wondered how such a serpentine creature would feel inside her pussy. Her tentacle-fetish awoke fully now and mesmerized she starred at the squirming mass of green roots....