So is it fine with her if other women send you emails or TM? Stop and think how A's begin.
She could be holding on to her "privacy" b/c you are too controlling and she is being stuborn about relenting her PW's. You've got to let up on preaching to her. If she hasn't more since than to take a nap at 8:30,then allow the natural consequences teach her that lesson. If you start on her,she'll resent it. She's an adult (even if she doesn't act like it).
Even after dropping an A, the feelings of the WAW doesn't return overnight. It takes time. Most LBH's that I've read about want to hear their WAW commit 100% to working on the M. She, on the otherhand, is trying her best (we hope)to work up to that line where she can feel that she's willing to be willing. Now I said all of that as if the W did end all A's and has stopped the flirting over Internet.
As long as she's flirting with "friends" then she's keeping a door open to a forbidden area that only her H should have.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!