Yeah, but you can tell. The setting is on top of her neckline, though seeing it in motion, you could assume it sticks under.
Props to her, then! That was good.
That, at least, was noticable. My brother even caught it, and he had no idea. He thinks Cersei did it, and Olenna's behavior was a red herring.
There is some of that, and I try to be understanding about the need to accomodate the realities of the medium. I just don't see why they assume that while the books were sufficient to attract readers and retain a large audience for the rest of the series, they feel the need to Sandersonize the dialogue, or ram Anglo-European actors into an American book. Or shoot so many extraneous brothel and prostitution scenes. Or shoot the temperate-climate "capital" on Cyprus, while going back to Ireland for Storm's End which is considerably south of King's Landing. Not enough castles or medieval-europe-type places in Ireland for them to shoot? Maybe the travel budget could have paid for a battle scene in the first season, in addition to having the whole country LOOK like a single country and culture. Especially since they're downplaying the distinctions between the Seven Kingdoms, and emphasizing the unity of Westeros for the sake of simplicity.
I think all the emphasis on how he had killed Ned, and rubbed the destruction of her family in her face was a deliberate mislead by the showrunners. People who don't read are more easily suckered, and they are the kind of people who would have been targeted by that kind of thing. Although, speaking of the part with the sword, you'd think they'd have included some of the actual book dialogue (which is always better when they do use it - the Greatjon's lines about Robb, and Mirri Maez Duur's confession in season one, and Tywin's dismissal of Tyrion's inheritance last season being examples that leap to mind), and have Tyrion share his suspicions with Sansa re: the fate of Ice and Joffrey's assassination attempt on Bran. Those would have been the icing on the cake of giving Sansa a motive for the viewers.