Rather than fight or flee, stay with her and validate her and her emotions. Accept full responsibility for her pain, give her your permission to scream, and allow her to cycle through the rage that is flowing from her broken heart. Be the rock to whom she can anchor as the waves of rage emotionally toss her to and fro.
When the rage subsides, be there with her, using words of encouragement, affirmation, and reassurance of your love and commitment. I know that this sounds counter-intuitive, but it is the only way to help your wife work through her emotions and achieve full emotional health once again. Your presence in these moments coupled with your loving affirmation will go a long way to creating the new, intimate normal for which you both long."