Antonia and Bea, I too find a bit of "opposite" behaviour in my W.
There is no real sign of boomerang... or any clinging... she has been venom and spew, pretty much all the way...
YET... in a recent dialog regarding the kids, she added thoughts about how the past year had been an emotional roller coaster for her, from anger to grieving to not caring to complete devastation...
When I validated and offered to be open and available if she wanted to further share her thoughts and feelings, she immediately went back into "guard mode" and retorted that she had NO intention nor desire to share her thoughts and feelings.
WTH? She had just done so... ???
And then, there's her offer of what she believes is very generous and gracious and giving of herself. Yet the moment I question it and not sign, it's spew and venom all the way and being blamed for making her (which she said she would never do; and I said I wouldn't agree to, before she even went to her L) get the SA drawn up...
I suppose that is an artifact of what are sometimes called the "off and on" and "vanishers". Why they do that, who knows... Self protection, I guess...