Its a familiar tale, I’m afraid. As I suggested earlier, its usually something like that that creates the split.
Years down the line from a similar situation, its difficult to blame one person or another…..its usually the result of deep rooted unhappiness in a relationship, rather than the actual affair thats the issue.
All you can do now is remain in control of your emotions and ensure you get access to your Child. Anger and frustration is obviously boiling up in you, but you’ll be playing into her hands if you allow it to come out.