Moral dilemma--not sure what to do

You could say something along the lines of: “Well I was sorting through some junk on my computer the other day…”, pretend that you haven’t gone through those log files yet, but you’re planning to and hope she fesses up. Then again, you could go with option two, tell her you know but pretend that you’re cool about it all: this would allow you to get it out in the open and a chance to lay down some ground rules.

If you want to cut her off, you can say it’s because you cheated with her best friend before you broke up and you don’t feel you deserve someone like her. That ought to do some damage, but only try if you’re sure you can control the situation. Actually, there’s no way to predict what kind of response you’ll get (depends on what kind of spin you put on it), but if you’re looking for something different…

Then again, you could always put the information you have for more creative opportunities such as blackmail. So many possibilities… Anyway, it really depends on what you want to get out of it. If it’s guilt traps or weird power relationships, then don’t hesitate to do something odd. If you want closure, one way or another get things it all out in the open. Of course, if you want to repair a friendship, then at least demand some level of honesty.

Jam it back in, in the dark.