I read your sitch because this could be me down the road. Just like you I have my boundaries and will not be a part of M with a 3rd party.
You have a lot of good advice here on your sitch. Good luck with your talks with your W today. My support goes to you man. Chatter is right, give your kids extra love today.
Newman
me40; W43 M18; T~20 D18; S13 & S3 bomb 5/9/11 EA busted 4/30/12; 9/4/12; 4/29/13; 6/10/13 same OM
Separated 4/1/14
"Even a flicker of light will shine through darkness-12/25/2012"....better days ahead.