I write about this all the time it is called the illusion of action. You feel you have do something to stop the D when in reality it is the exact opposite.
You need to take the focus off your W and solely place it on you and your son. You need to get to a place where you you have a great life for your son and you and if she wants to join you great, if she does not that is ok too.
A person who loves and values themselves is not going to tolerate a spouse having an A and telling them for two years they do not want to be married to them.
Something to think about.
ABSOLUTELY NAILED IT!!!!! WHne I did this it canged the entire dynamic of the situation.
Me: 39 W: 38 S: 15 D: 12 D: 6 BD 8/15 NEED SPACE S 2/16 Divorced 4/17 and loving it, waw came back 12/17.....I declined