What she is going to tell a friend and what she will say to you are two different things. I think it's safe to say that she (in her own strange way) is also hurting.
The chances are good that she is going to come into the meeting with a tough-girl attitude. Think of yourselves as both walking into a spaghetti western gunfight. Both of you are going in armed to the teeth. She is bitter about you having exposed her and discrediting her. You are disgusted with her betrayal. This will be an emotionally charged meeting.
Do your best to keep your cool. You have some things to say, say what you have to say if she doesn't want to talk. Chances are 80% that she is going to tell you something along the lines of, "I was thinking of giving us another chance but what you did sealed your fate and ended us." ... That is standard script. Don't let it get to you.
Read the environment. If she is too hostile then make the meeting about arranging a suitable time to get the rest of your belongings.
Good luck F.
M:11 | T:12 | Status: Married 4C's of WAS communication: Cool, Calm, Collected and CONFIDENT