I had never heard of separation counseling before, so I looked it up. If you truly want to try to salvage your M - and that is something only you can decide - then separation counseling obviously does not serve your best interests. More likely, it will serve to facilitate your divorce and ease your Ws guilt. (sounds like my former MC, unfortunately).
I am not sure what you should tell her - perhaps a veteran can weigh in - but here is a suggestion: "I am not interested in separation counseling at this time". You don't owe your W any explanations. Just be polite, but firm, that you will no longer be going. If she asks why, just politely tell her that you are no longer interested.
I am not sure if this will push your W more towards D. I would really be interested in what others have to say.
Remember, this is all new to you. Your W had plenty of time to think about divorce and separation.
