"I didn't think your kind usually had to put so much work into getting someone's attention."
She hadn't meant it to be as rude as it sounded, but Lettie's social skills were rusty (see also: practically nonexistent) and her knowledge of incubi painfully limited. Add to that a natural curiosity about the world, particularly the strange fantasy realm Arkady had built up around himself, and you had the perfect recipe for 'open mouth, insert foot' with a side of 'nosy bitch'.
Fortunately, she wasn't an idiot, and she had the good grace to both realize her comment had come out wrong, and to look apologetic, the expression readable even with her mirrored, impenetrable goggles on. "Sorry, uh...I just...I've seen you. You know, leaving stuff for...I don't know which once, actually, but...I mean...Do you really like her like her?" A naive question, but then, so was the one asking.