Imho perpetual blending does not always resolve conflict. It often only prolongs the inevitable. This case was different.
I totally agree.
In this case there are a couple of things that struck me though:
One is that she did from the start tell him "I don't buy it." She didn't do a pat "yes dear I hear you" blend. She actually stated her reaction to his attack - and she continued to reframe things. You'll note this very much took his balance - lots of "huh?"s and angry "oh you mean this...", which she continues to reframe - like from the start she had a gut feeling that it wasn't about what he said it was about so if she reframed it, it might work.
The reframing is sort of a continual kuzushi more than a continual blend, I guess, now that I think of it!