It will always be different, but maybe through therapy, time, forgiveness, and the assistance in medications you can possibly work it out again. Of course it will be very difficult to trust her again, but people make mistakes, and giving her one try, and one chance can benefit you and her. If she is to cheat again, then I would definitely end it for sure.
I hope all works out well and you can pick up the broken pieces and find what's the best decision for you.
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