Heck i might have a bit of sympathy for her if it was a one off kind of thing. But it went on for 4 goddam months until she finally realized that maybe what she was doing wasn’t the best idea. And while it is good that she’s doing all of those things to change, on top of the fact that she actually came to you and confessed, the fact of the matter is that she betrayed your trust. And unless you’re prepared for a relationship where you’re constantly worrying about who she associates with or whether or not she’ll go back on her word not to cheat, then i suggest you really think about whether or not this relationship is best for either of you.