No she hasn't been nasty, but the past 2 weeks she has become ? Can't put it into words but her character has lost something. She also is showing signs of the other extreme of women, can't make a decision and stick with it. Fickle. ?
I dont know if she is really indecisive, I think she has already decided. She's done with Jack. But you are right about the last two weeks. It is as if the actress is protesting this shift in affection, she has been flat. She seemed more believable prior to those last two weeks.