I too "snoop" lots of times I get pretty ticked at what I find, but then I have to remind my self of the old adage "those that listen at doors deserve what they hear". You've handled the sitch pretty good. Like you said things are improving....
One thing. The emotional energy your w is spending on her EAs is supposed to be going to you and the marrige. You deserve that much, and she needs to know that. She is still wiping her feet on the marriage all in the name of "helping or keeping new friends". Your marriage doesn't need those kind of friends in it. Tell her what she's doing is hurting you... and then hope she has the moxy to change.