Yes, you missed the posts where some people were complaining that Anna has turned into nothing more than a 'dumb whore' and will now spread her legs for every Tom, Dick, and Harry that comes along.
About the excuses she makes for not wanting to have these sexual encounters, I think she's trying to hold onto the idea that she wants to be monogamous and stay faithful to Andrew, and doesn't want to accept that's she's really a very horny girl at heart. Personally I don't think that Anna is really meant to be in a monogamous relationship.
But I do agree that some of the scenes could've been written better without all of the 'I shouldn't be doing this' dialogue.
About the excuses she makes for not wanting to have these sexual encounters, I think she's trying to hold onto the idea that she wants to be monogamous and stay faithful to Andrew, and doesn't want to accept that's she's really a very horny girl at heart. Personally I don't think that Anna is really meant to be in a monogamous relationship.
But I do agree that some of the scenes could've been written better without all of the 'I shouldn't be doing this' dialogue.