As I’ve said before I think you’re situation is different but the DB concepts are still in play here. The fact that she’s had an affair and is asking to separate should not be taken lightly.
At this point I wouldn’t put much stock in anything she says right now because she likely doesn’t know what she wants right now. My guess is she has lost attraction for you and is questioning if she sees a happy future together. Affairs are like cocaine and she is probably questioning why she doesn’t get the same feeling with you that she had during the affair.
How you act during this can and most likely determine the outcome. Your GAL for tomorrow is good. Keep it up.