It's 'sexposition', as in using sex to provide exposition.

You're right, I think the consent is explicitly given in the books by the end. But my point is that it's somewhat vague about how much she protests in the beginning. The 'weakly' part comes from Jaime and I think it's difficult to know how much of that is his own interpretation (he also says that he's barely hearing…

I don't think we can say that rape absolutely didn't happen in that scene in the books, because the scene is written from Jaime's point of view and it's difficult to get a full picture of how Cersei is responding. It certainly seems like she's protesting to some extent, and Jaime carries on regardless. But it also…