I know you've mentioned restricting her access to the house - is the house only in your name or pre-marital property or something? I have no idea on the legal aspect of it, but just want to note that if I understand right and she is just informally moving out, if she still has a stake in the house as marital property you might have trouble enforcing your lockout if she resists. Just something to consider.
Me, WW - Upper 30s BD - Apr 1 2016 EA - Apr 7 2016 (discovered; ongoing for months; did not confront right away) Confronted wife about EA - May 17 Wife sent NC email to OM - July 11