my ass in this situation irl would have so many questions because I actually know quit a bit about mushroom biology. see the big thing is that the 🍄 part of the mushroom is actually pretty much just a flower or a fruit while the true form of the mushroom is the mycelium which never actually leaves the ground. I would question if the girl was actually really a sapient life form or just faking it as a way to infect me in an attempt to help the mycelium reproduce using my body as a Vector. interesting to note about mycelium is it's actually a ageless life form meaning that as long as the environment it lives in remains stable it can pretty much live forever. the current oldest living mycelium actually predates the birth of Jesus christ by several hundred if not thousands of years. I personally would try to transplant her mycelium from the grow kit to a garden to see if another her would eventually flower from it.