Lotte tried to say it, but remembering how she felt when someone had guessed about her fable... she didn't think it was the best idea. As he finished his cup though she offered a smile, "More tea? Or do you have to go?" Politeness really. She didn't want to keep him here if he had somewhere else to be - but if he had another cup, she might be able to approach the subject of a Mad Hatter better.