Originally Posted by
Ago 
When she informed me of her decision to visit her family, I set a boundary, I said to myself if she 'disappears" for the whole weekend, which I strongly suspect she is about to do, in conjunction with her "going no contact" 3 out of 4 previous weekend nights, I am done. I can no longer live with the uncertainty, or the certainty actually that she will disappear every weekend for the night, it's not a matter of insecurity, it's a matter of a pattern developing I am not comfortable living with.
Ago, I know I don't know your entire situation, but did you talk to her about your descision to set a boundary before you reminded her of her past infidelity?
Is it possible the reason she disappears is that she needs some space, hence no contact?
Could it be that she is not cheating, but there is another explaination she's not comfortable talking to you about?
I'm not trying to be a butt. Honest. Obviously something is up when someone changes behavior like that.
I'm curious, you mentioned phone records. Which ones, yours or hers?