She is committed to the marriage ????

I would suggest , at this point, to try and schedule some time with one of Michelle's counselors....

Retrouvaille may be an option as well....

Keep posting and maybe some peeps that have been through Retrouvaille can give you some insight on which way to turn....

You have some really good odds at making it through this...

I would suggest that..IF you trust her still, stop snooping through things for now.