Well, Merder (sorry "I") thought I was piecing. The W said she wanted to work on things, was willing to call off affair with OM, etc.
That all changed. Actually, it changes every day.
So the strategy is sometimes just giving her space, other times actually working on the relationship through discussion, other times trying to bite my tongue as I hear about her devotion to the OM.
Tomorrow she might want to go to marriage counseling. I doubt it, but her whole attitude has shifted radically more than once, sometimes over the period of a few hours.
I've read the DB/DR books, along with a slew of others, and I try to incorporate their insights as I navigate this minefield.