Mozza: I know how you feel - it's like your best friend / spouse has been replaced by an imposter. The good and bad news is that THIS IS NOT ABOUT YOU. This is not becasue you did anything so wrong or aren't good enough or that your old relationship wasn't real. The issue is entirely within your wife - she is really messed up right now and lost and all the bad and selfish facets of her character are in full rebellion as she is trying to find herself, though it is clear to all of us that she is self-destructing. You can't stop this, you didn't break her, and you can't fix it right now. She is in crazytown right now and the only thing you can do is not get sucked into this with her.
Don't think about Halloween. You are only building up demons in your head that are most likly worse than the truth. Plus, think about it: she only told you to get a rise out of you, which sort of means that she cares about your reaction - hmmm, interesting.
Breathe. Take a step back and realize that there is something she is trying to figure out about herself and her life right now and you have to let her do that if you want her to find her way back to you.
Engaged Aug 2009 Fiancé had doubts Jan 2010 Happily re-engaged July 2012 Discovery of affair July 2014 Separated July 2014 Fiancé is confused about whom to choose Chose the OW Oct 2014