what she says: I'm fine.
what she means: in the prisoner of Azkaban Remus Lupin tell the students that no witch or wizard has ever seen a bogart in its true form, but in The Order of The Phoenix, Mrs Weasley ask moody to check the cabinet upstairs to see if it contained anything of the sort, reason being his magical eye can see through walls. that means the bogart couldn't see him so it couldn't transform into his words fear which meant mad eye moody Is the only wizard that has seen a bogart in it's true form but its never mentioned by any one again.