I too disliked the "we need to talk" mystery wait.
When the talk happens, remember to express but dont defend your feelings. And try to avoid the talk getting into an argument. Even if you win an argument with a woman, you still lose.
I get the feeling that you are going into the talk with an "I have nothing to lose" attitude as maybe the resentment/anger of your W is wearing on you.
BTW... I think the word you were looking for is "ominous".
