Well, what you can do now is to digest some of what has been posted GW.
Also, as Greek said above.
You do what you need to protect your kids, yourself, and give your M a fighting chance. Ending the A is kinda high on the priority list. Stop worrying about consequences for W, OM, and her reactions.
Me 42 W 39 Married: 11 Jan 1998, T: Since 1992 First Bomb: Sep 2007 Confirmed A/OM: 4 Nov 2007 Kids: D10, S5 Reconciled and together again after (alot of) time and heartbreak. 3rd kid, S, born 2 Jan 2010.