At the beginning of the story she bought the cats to avoid destruction but Did she forget ...

I want to say she thinks it’s the other cat maybe? But in general she’s pretty dumb/forgetful.

Because she doesn’t know he never told her he was dragon and if he did she thought he was joking and dismissed it

I think in the first place she bought the cats knowing one of them is a prince or dragon that might destroy the world whatsoever. I already forgot that since the story is so focused on how lucky is the mc.