The use of the word torture seems pretty appropriate. We have a tendency to torture ourselves with negative self-talk/associations, etc. It seems like that was what she was getting at. It doesn't at all sound like she was "blaming" you for her choice of words; she just found the term apropos for what she was saying.

It also doesn't sound like she is tired of you or anything. She is just bringing up the fact that at this point, you might very well be frustrated with how things are going because you have been working so hard for so long. I totally get that.

Talk to her about how you have reacted to what she has said. Clearly you need to talk this out.