She is intoxicated. Her brain chemistry is fn up with her and she had the misfortune that her BF convinced that this was a good idea.
Yep. And now she has the incredible opportunity -- via a loving, forgiving God and a very loving and forgiving husband -- to ATONE for that mistake, and to make the DECISION -- today -- to "pour the liquor down the drain," as it were.
The road to reconciliation and healing is a long one, and will be tough. But the decision is a simple (not "easy") one, made of her own free will. You do her no favors by enabling her "victim" mentality here, F, and I'd strongly encourage you to do more reading about infidelity to better understand what you're dealing with here, because you're not going to be able to effectively operate from a "Oh, the poor dear!" mindset towards your wife in the incredibly difficult days and weeks ahead.