Once a cheater always a cheater. She will not stop cheating. She broke the worst rule "honesty" between a couple. There is a difference between a person that makes a stupid mistake such as cheating and realizing what they did and being honest with their partner about it and one who simply gets caught. You caught her, she was't going to tell you, so yes, I think she'd do it again. Tell her to hit the bricks. You deserve better.