As others have said, she needs to find the right therapist because she has many issues to work through. She is lucky that you love her. Sometimes it can be hard to admit to ourselves how much we have hurt the people (who have only tried to help us) we love so we blame them instead of admitting fully to ourselves that WE are the problem. What she did was significant and terrible so BOTH of you (including her) are going to have to acknowledge each others feelings and POV before you can put this incident behind you. It will take time. Hopefully, she is ready to be more honest and self reflective about her relationship with you. Marriage therapy was also a good idea. Since she has finally admitted lying to you--perhaps that can be a starting point enabling you to eventually improve your marriage but she needs to acknowledge (listen rather than telling you to move on) your hurt feelings in this matter. She is not the only person who has things to work through here....