You had walked into what you had supposed to be a giant, run down building. You then saw, as you strolled inside, that this held one, singular, massive flat... as you walked into that flat, you then saw that Crowley was just chilling, making sure all her plants were normal, when you somehow managed to walk into the flat... you thought the door would be locked. Turned out the flat wasn't abandoned or locked and you're just about 1cm tall. So, technically, you're stuck in a room with a giantess. Unless you wanna run away? But that's boring...