since I am really letting go and really having doubts about M anyway, how to share that??
I wouldn't share that. This really isn't the venue for that. You have concerns to work out and I would stick to business. You have plenty of practical issues to address. Also, if you bring up doubts about the marriage, it could be thrown in your face at a later date. Believe me, I know.
Baby steps. Do you know what they mean? Are they really baby steps? People used to tell me about my ex's baby steps. They were baby steps away. You can't do business trying to guess what the effect might be on another. You just can't know.
AS you said,
Quote:
I am approaching it from a standpoint of tackling practical issues via mediation, with the hope that it might lead to other issues that might benefit us.
If the other issues come up, then just be open and honest. Don't overthink. You know how you feel. Go with it.