Oh, jeesh, I'm so sorry to hear this. It does confirm the 'transference' thing she's been doing to you. Meaning, if she's convinced herself that you cheated before, then she can engage in a behavior she knows for certain is WRONG. She's found her justification.
Also explains her badmouthing of you to friends and family. She has made you into the 'bad' guy so she doesn't have to feel guilty about her behavior.
You CAN make it through this, and you can still DB, although I'm sure you are so pissed and hurt right now you probably want to throw the darn book through the window.
