You have two choices:
1. Leave her right now before you get any further involved in this mess and stay with her while not trusting her and always wondering what she's doing after she drinks when she's not with you. Or ...
2. Forgive her 100% after you've laid down some ground rules that state what you are and are not ever going to tolerate in the future and then get on with your life while putting this behind you never to be dredged up everytime the two of you have an unrelated disagreement.
Don't stay with her while you can't forgive her and have a relationship based on how you can make her pay for her mistake... that's just dysfunctional and it will steal the joy from both of you.
You decide what's next.
“The willingness to accept responsibility for one’s own life is the source from which self-respect springs.” ~Joan Didion