i never took a liking to her either for the same reasons; my excuse for her tho is that she was a petulant child of privelege who has had to learn gratitude the hard way ("there are more important things" at the dinner table when served gruel). That's the one comforting thing i tell myself to not write her off. She's paid the price, so to speak. I think her "white lie" to Jon here is more a product of her abuse , her oppression and trauma, more than anything else; she's only known torture and lies for so long so this is more of an extension of that. Psychoanalysing aside, i wonder if this omission will end up turning into a huge red wedding size mistake on her part. She think she's being wise and clever, perhaps like Littlefinger and Margaery; in reality she's not ready to come to terms with the truth of her situation - that she still has to slowly build up her sense of self after all that suffering.