Not at all surprising, she is not to the point she is going to own her faults with the M, and by blaming you for the downfall that justifies the A, which she has most likely been doing for some time, but now she is just verbalizing this to you.
Drink the STFU Smoothies and let her express herself, you might be able to pick up some valuable information provided you can wade through the history re-writes she will do ... Call her on those, if something is not true, truth dart her.
As you said .. own your half .. not hers, keep your side of the street clean and let her tend to hers.
