There was a poster here for years named Sandi2 (I shared some of her links on your thread y'day) who wrote about her view on the difference b/w a WW and a WAW. She herself was a WW and her writing is deeply insightful. Essentially a WAW is one whos needs have not been met in the MR and after years of feeling ignored, decides to file D and leave the relationship. Essentially they give up on things ever getting better. Coach and Greek are two old posters who typify this dynamic - Greek (the W) filed D and Coach (H) woke up to his issues and as a result of him focusing on himself and his problems, they saved the MR
A WW is a woman who betrays her spouse in some way (EA, PA, etc) and engages in acts of rebellion, what Sandi called Girls Gone Wild. These behaviors are normally the result of a loss of respect for her husband that grows into deep resentment and finally acting out.
I'll let the vets weigh in but that my two cents. Your wife sounds like a WW, as is mine.