She felt her body agree, and she felt her womb bite down on her tentacle, slicing it...
After a flash of pain, which soon disappeared, she felt all connections to her tentacle disappear, like something had tripped a breaker inside of her spine.
From her vision, she saw the tentacle emerge from the womb, looking bloodied and... sliced, a horrifying sight, but she took it calmly, as she felt the forces inside of her body reach out to it, to shape it.
The side halves of the tentacle were gone, leaving a thin wide strip of exposed muscle, which quickly healed itself. Watching, she knew that the intention she had given was doing its work, shaping it, texturing the surface, realigning muscles that's more strengthened, less quick, more fortified.
She felt it fill up her cunt, gasping softly, as the nerves began to reconnect. She knew what it was, of course, she had asked for it.
After a moment, the nerves reconnected completely, and she twitched a grimace as the flash of dull lingering pain hit with it as well.
She moved it, and felt her awe rise... "Oh my god... its... real..."
Michelle sat down on the floor, and leaned forward, looking at her own pussy.
From it, a tongue emerged, bright red in colour, moistured with her fluids. In one motion, it licked away all of the lingering and caked-on fluids around her cunt, and pulled it inside to "swallow".
She giggled, and then squealed in excitement. Thumping her legs against the ground, laughing as she licked between her folds, letting herself moan, and then cough, before she fully realised what she had just done; she had just commanded her body to change for her, shape-shift.
She's becoming a shapeshifter, eating the DNA of animals to adapt to their features.