Surviving,
There are several ways to go about this but only ONE way to look at it. The one way???
Her having opposite sex friends is a big NO GO. She has proven she is not trustworthy. She should not be around other men while married to you.
Now I also get the feeling she still feels entitled to do anything she wishes, and with that attitude your marriage is still in peril with or without the affair.
So I answered your question, but you implied another one so I will take a shot at this one as well.
How do you get her to stop this without it sounding as if you are her father?
There are several ways to go about this. I prefer the boundary approach. You first figure out your boundaries, and what you are willing to do to enforce them. Then you simply state your boundaries to your W without telling her what you will do.
For example, let's say (purely speculation right now
), is not someone you trust with other men. Let's say you really have a thing about your W being emotionally connected to another man much less physically. You simply tell her that you will not spend your life policing her behavior, but you will not accept her talking to, confiding in, and spending time with another man.
What will you do if she violates that boundary? You could separate, you could file for divorce. You could force her and you into counseling before the other actions. BUT, these are your actions to protect YOUR boundaries. You are not telling her what to do or not do, you are simply telling her your boundaries for remaining happy in a marriage. It is her call if she decides to cross over this boundary.
I think what many people miss is that plan A and plan B along with Harley's four rules for a good marriage are very powerful, but they should be done within context of boundaries. More specifically your boundaries and the actions you are willing to take to enforce them.
So have a look inside yourself. What will you tolerate? What do you want? What will you never tolerate? What are you going to do if any of these things are challenged?
These are for YOU to address not your W.
HOpe something I have said is of help.
God Bless,
JL