[Vautrin]

It does sound like some sort of affair is going on. As long as you don't fight for the Marriage, it will fall apart (because she will be busy with this new friend).

Doing nothing to address the issues is not an option. I think being firm and resolute is what is required. Be very clear with her what you want, what you don't want, and what you are willing to do. And what the consequences are if she does not follow through herself.

What is it your wife is complaining about, what has she done to try and address those issues herself? What have you done to address those issues?